# Problem using MEMOS extension

**URL:** <https://discourse.slicer.org/t/problem-using-memos-extension/34456>\
**Category:** Support\
**Tags:** segmentation, slicermorph\
**Created:** [February 8, 2024, 2:25pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456 "2024-02-08T14:25:31Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 8, 2024, 2:25pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/1 "2024-02-08T14:25:31Z")

</div>

Dear Murat,  
very excited to use this tool for tests but I seem to be stuck. Most likely a problem with my environment but any suggestion or help appreciated.  
I installed a fresh version of slicer (5.6.1) on windows 11. Memos seems to instal fine so as pytorch utilities.  
Upon selecting the downloaded IMPC sample data from your github as volume and the segmentation model “best\_metric…pth”, I click Apply. It runs for a few seconds but no segments are visible…

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [February 8, 2024, 4:01pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/2 "2024-02-08T16:01:12Z")

</div>

Yeah, if it ran a few seconds and stop, it is mostly likely stopped due to an error (possibly torch). Please share your log file (CTRL+0).

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 12, 2024, 8:55am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/3 "2024-02-12T08:55:30Z")

</div>

Thank you Murat,  
I had a couple of error messages:

1-

```auto
required package for reader itkreader is not installed, or the version doesn't match requirement.

```

2-

```auto
Using device: 0
MONAI version: 0.9.0
Numpy version: 1.26.1
Pytorch version: 2.2.0+cu118
MONAI flags: HAS_EXT = False, USE_COMPILED = False
MONAI rev id: af0e0e9f757558d144b655c63afcea3a4e0a06f5
MONAI __file__ : C:\Users\steph\AppData\Local\slicer.org\Slicer 5.6.1\lib\Python\Lib\site-packages\monai\ __init__.py
Optional dependencies:
Pytorch Ignite version: NOT INSTALLED or UNKNOWN VERSION.
Nibabel version: 5.2.0
scikit-image version: NOT INSTALLED or UNKNOWN VERSION.
Pillow version: 10.1.0
Tensorboard version: NOT INSTALLED or UNKNOWN VERSION.
gdown version: NOT INSTALLED or UNKNOWN VERSION.
TorchVision version: 0.17.0+cu118
tqdm version: NOT INSTALLED or UNKNOWN VERSION.
lmdb version: NOT INSTALLED or UNKNOWN VERSION.
psutil version: NOT INSTALLED or UNKNOWN VERSION.
pandas version: NOT INSTALLED or UNKNOWN VERSION.
einops version: 0.7.0
transformers version: NOT INSTALLED or UNKNOWN VERSION.
mlflow version: NOT INSTALLED or UNKNOWN VERSION.
pynrrd version: 1.0.0

For details about installing the optional dependencies, please visit:
https://docs.monai.io/en/latest/installation.html#installing-the-recommended-dependencies

Using device: cuda

```

3-

```auto
Traceback (most recent call last):
  File "C:/Users/steph/AppData/Local/slicer.org/Slicer 5.6.1/slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py", line 245, in onApplySingleButton
    logic.runSingle(tempVolumeFile, self.modelPathSingle.currentPath, tempOutputPath)
  File "C:/Users/steph/AppData/Local/slicer.org/Slicer 5.6.1/slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py", line 480, in runSingle
    output_raw = sliding_window_inference(
  File "C:\Users\steph\AppData\Local\slicer.org\Slicer 5.6.1\lib\Python\Lib\site-packages\monai\inferers\utils.py", line 215, in sliding_window_inference
    output_image_list.append(torch.zeros(output_shape, dtype=compute_dtype, device=device))
torch.cuda.OutOfMemoryError: CUDA out of memory. Tried to allocate 5.35 GiB. GPU 0 has a total capacity of 6.00 GiB of which 1.88 GiB is free. Of the allocated memory 2.20 GiB is allocated by PyTorch, and 53.75 MiB is reserved by PyTorch but unallocated. If reserved but unallocated memory is large try setting PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True to avoid fragmentation. See documentation for Memory Management (https://pytorch.org/docs/stable/notes/cuda.html#environment-variables)

```

I’m sorry, but I am not exactly sure where to go from there on this windows version…

Kind regards

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [February 12, 2024, 3:26pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/4 "2024-02-12T15:26:29Z")

</div>

The important message is at the very end. You ran out of gpu memory. Our model requires gpu with at least 8GB, you have 6gb. You can try to install the cpu only version of the torch and retry, but it will be much slower.

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 14, 2024, 9:38am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/5 "2024-02-14T09:38:51Z")

</div>

Thanks Murat,  
apologies for not checking this. In fact I had tried it on my own windows laptop after getting stuck somehow on a different system. So, I have a 5.6.1 version of slicer running in linux and a calculation server with a very powerful GPU.  
Slicer just crashes and I’m not able to recover a log.  
all I get is: “SlicerApp-real] exit abnormally - Report the problem.”

Kind regards

---

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 14, 2024, 11:41am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/6 "2024-02-14T11:41:04Z")

</div>

Does this error occur when you start the segmentation?

You can view logs of previous Slicer sessions in the menu: Help / Report a bug.

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 14, 2024, 1:04pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/7 "2024-02-14T13:04:27Z")

</div>

Dear Andras,  
thanks for your help,

It happens when I click apply. The programm thinks for 20secs, then crashes

The bug reports does not refer to a simple crash:  
I have only changed directory paths for safety issues

[DEBUG][Qt] 14.02.2024 10:25:57 (unknown:0) - Switch to module: “MEMOS”  
[DEBUG][Qt] 14.02.2024 10:26:36 (unknown:0) - “Volume” Reader has successfully read the file “/MYDIRECTORY/IMPC\_sample\_data (2).nrrd” “[0.54s]”  
[INFO][Stream] 14.02.2024 10:26:42 (unknown:0) - Checking python dependencies  
[DEBUG][Python] 14.02.2024 10:27:16 [Python] (/MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py:372) - Pillow Python package is required. Installing…  
[INFO][Stream] 14.02.2024 10:27:28 (unknown:0) - Requirement already satisfied: pillow in /MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/lib/Python/lib/python3.9/site-packages (10.1.0)

As everyone guessed, I’m fairly novice here. Please let me know if there are any other type of information that may help and how to access them.  
…and thank you for making slicer such an amazing tool and vibrant community !

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [February 14, 2024, 3:47pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/8 "2024-02-14T15:47:44Z")

</div>

Is this the full log? Crash is not visible in this one.

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 14, 2024, 4:40pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/9 "2024-02-14T16:40:04Z")

</div>

**Dear Murat, thank you again for your help.**

**I don’t see an error message after the crash as well.**

**I repeated the steps to be sure, and this is the full log file content:**

[DEBUG][Qt] 14.02.2024 17:29:03 (unknown:0) - Session start time …: 20240214\_172903

[DEBUG][Qt] 14.02.2024 17:29:03 (unknown:0) - Slicer version …: 5.6.1 (revision 32438 / 117ce5f) linux-amd64 - installed release

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Operating system …: Linux / 4.18.0-372.32.1.el8\_6.x86\_64 / #1 SMP Fri Oct 7 12:35:10 EDT 2022 / US-ASCII - 64-bit

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Memory …: 12188948 MB physical, 16383 MB virtual

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - CPU …: GenuineIntel Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz, 384 cores, 768 logical processors

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - VTK configuration …: OpenGL2 rendering, TBB threading

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Qt configuration …: version 5.15.2, with SSL, requested OpenGL 3.2 (core profile)

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Internationalization …: disabled, language=

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Developer mode …: disabled

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Application path …: /beegfs/data/MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/bin

[DEBUG][Qt] 14.02.2024 17:29:04 (unknown:0) - Additional module paths …: [slicer.org/Extensions-32438/SlicerMorph/lib/Slicer-5.6/qt-scripted-modules](http://slicer.org/Extensions-32438/SlicerMorph/lib/Slicer-5.6/qt-scripted-modules), [slicer.org/Extensions-32438/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-loadable-modules](http://slicer.org/Extensions-32438/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-loadable-modules), [slicer.org/Extensions-32438/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-scripted-modules](http://slicer.org/Extensions-32438/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-scripted-modules), [slicer.org/Extensions-32438/MarkupsToModel/lib/Slicer-5.6/qt-loadable-modules](http://slicer.org/Extensions-32438/MarkupsToModel/lib/Slicer-5.6/qt-loadable-modules), [slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules](http://slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules), [slicer.org/Extensions-32438/PyTorch/lib/Slicer-5.6/qt-scripted-modules](http://slicer.org/Extensions-32438/PyTorch/lib/Slicer-5.6/qt-scripted-modules)

[WARNING][Qt] 14.02.2024 17:29:13 (unknown:0) - libpng warning: iCCP: profile ‘ICC Profile’: ‘CMYK’: invalid ICC profile color space

[WARNING][Qt] 14.02.2024 17:29:13 (unknown:0) - libpng warning: iCCP: known incorrect sRGB profile

[WARNING][Qt] 14.02.2024 17:29:13 (unknown:0) - libpng warning: iCCP: too many profiles

[WARNING][Qt] 14.02.2024 17:29:14 (unknown:0) - libpng warning: iCCP: known incorrect sRGB profile

[DEBUG][Python] 14.02.2024 17:29:16 [Python] (/beegfs/data/MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/lib/Slicer-5.6/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:39) - Scripted subject hierarchy plugin registered: SegmentEditor

[DEBUG][Python] 14.02.2024 17:29:16 [Python] (/beegfs/data/MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/lib/Slicer-5.6/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:39) - Scripted subject hierarchy plugin registered: SegmentStatistics

[DEBUG][Qt] 14.02.2024 17:29:16 (unknown:0) - Switch to module: “Welcome”

[DEBUG][Python] 14.02.2024 17:29:17 [Python] (/beegfs/data/MYDIRECTORY/soft/Slicer-5.6.1-linux-amd64/lib/Slicer-5.6/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:39) - Scripted subject hierarchy plugin registered: FormatMarkups

[INFO][Python] 14.02.2024 17:29:17 [Python] (:3) - Adding SlicerMorph Volume Rendering Presets

**However, I paid more attention to my terminal. In fact, here I might have further clues. Here is full log (from opening slicer, loading data, loading module, selecting IMPC sample data, and clicking apply in MEMOS):**

Execution de la commande sur le serveur GPU distant.

commande : ssh -X webern01 /opt/VirtualGL/bin/vglrun -d :0 /MYDIRECTORY/Slicer-5.6.1-linux-amd64/Slicer

st6962co@webern01’s password:

[VGL] NOTICE: Automatically setting VGL\_CLIENT environment variable to

[VGL] 172.16.80.62, the IP address of your SSH client.

libpng warning: iCCP: profile ‘ICC Profile’: ‘CMYK’: invalid ICC profile color space

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: too many profiles

libpng warning: iCCP: known incorrect sRGB profile

Switch to module: “Welcome”

Switch to module: “MEMOS”

“Volume” Reader has successfully read the file “/MYDIRECTORY/IMPC\_sample\_data.nrrd” “[2.81s]”

Checking python dependencies

Requirement already satisfied: pillow in /beegfs/data/MYDIRECTORY/Slicer-5.6.1-linux-amd64/lib/Python/lib/python3.9/site-packages (10.1.0)

“Color” Reader has successfully read the file “/MYDIRECTORY/Slicer-5.6.1-linux-amd64/slicer.org/Extensions-32438/MEMOS/lib/Slicer-5.6/qt-scripted-modules/Resources/Support/KOMP2.ctbl” “[0.02s]”

Using device: 0

MONAI version: 0.9.0

Numpy version: 1.26.1

Pytorch version: 2.2.0+cu118

MONAI flags: HAS\_EXT = False, USE\_COMPILED = False

MONAI rev id: af0e0e9f757558d144b655c63afcea3a4e0a06f5

MONAI **file** : /MYDIRECTORY/Slicer-5.6.1-linux-amd64/lib/Python/lib/python3.9/site-packages/monai/ **init**.py

Optional dependencies:

Pytorch Ignite version: NOT INSTALLED or UNKNOWN VERSION.

Nibabel version: 5.2.0

scikit-image version: NOT INSTALLED or UNKNOWN VERSION.

Pillow version: 10.1.0

Tensorboard version: NOT INSTALLED or UNKNOWN VERSION.

gdown version: NOT INSTALLED or UNKNOWN VERSION.

TorchVision version: 0.17.0+cu118

tqdm version: NOT INSTALLED or UNKNOWN VERSION.

lmdb version: NOT INSTALLED or UNKNOWN VERSION.

psutil version: NOT INSTALLED or UNKNOWN VERSION.

pandas version: NOT INSTALLED or UNKNOWN VERSION.

einops version: 0.7.0

transformers version: NOT INSTALLED or UNKNOWN VERSION.

mlflow version: NOT INSTALLED or UNKNOWN VERSION.

pynrrd version: 1.0.0

For details about installing the optional dependencies, please visit:

[https://docs.monai.io/en/latest/installation.html#installing-the-recommended-dependencies](https://docs.monai.io/en/latest/installation.html#installing-the-recommended-dependencies)

Using device: cuda

error: [/MYDIRECTORY/Slicer-5.6.1-linux-amd64/bin/SlicerApp-real] exit abnormally - Report the problem.

**Slicer quits at this last step**

---

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 14, 2024, 5:02pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/10 "2024-02-14T17:02:28Z")

</div>

It would worth a try running the inference in a separate process, started within Slicer - added an issue for enabling this in SlicerMEMOS:

> <https://github.com/SlicerMorph/SlicerMEMOS/issues/15>
>
> It seems that inference is run inside the Slicer process: https://github.com/Sli…cerMorph/SlicerMEMOS/blob/4b30659ee57b2be49b58c99822e16a221b12c4d0/MEMOS/MEMOS.py#L245
> 
> Many things can go wrong during a complex and heavy computation task, so you want to isolate it from the application by running it in a separate process. That allows you to keep using the application while the computation is running, you can stop the process anytime (by killing the computation process), and you can prevent the application from crashing if the computation process is terminated (e.g., due to some errors in PyTorch or due to the operating system killing the process because of using too much resources).
> 
> You can use MONAIAuto3DSeg extension as an example. It launches \[auto3dseg\_segresnet\_inference.py\](https://github.com/lassoan/SlicerMONAIAuto3DSeg/blob/main/MONAIAuto3DSeg/Scripts/auto3dseg\_segresnet\_inference.py) script in a separate Python process.
> 
> Note that you would still use Slicer's Python environment, the only change would be that the inference is running in a separate process.

If it still crashes then you could try to run the script independently from Slicer (using the input files that Slicer generated). If still does not work then test if you can run the same script from a different Python environment. If still does not work then you may have some GPU driver issues. If the script works in the external Python environment then you can get hint about what’s wrong by comparing packages in Slicer’s Python environment and in the external Python environment.

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [February 14, 2024, 5:37pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/11 "2024-02-14T17:37:58Z")

</div>

@coco I think you said this is a linux system. How are you running the Slicer application, are you using VirtualGL (vglrun)? If so, there is actually a bug that causes a crash in torch in specific server drivers (Nvidia grid drivers).

> <https://github.com/VirtualGL/virtualgl/issues/227>
>
> We are using vgl on a cloud server with A100 gpu (grid driver 525.60.13) with 3D… Slicer with egl backend.
> 
> If we invoke the slicer without vglrun, our torch based application works fine. If we start the Slicer via 
> vglrun -d egl ./Slicer 
> 
> a little after the torch starts loading the trained model, application crashes. There is no error message (neither in Slicer not in vglrun) that I can locate. 
> 
> I am assuming it is a weird combination of the driver being used and VGL, as we can't replicate this crash on our local machine (though we use ubuntu 20.04, not 22.04, and we have RTX A4000 not A100). 
> 
> I would appreciate some pointers on how to troubleshoot this. Thanks.

If you are using vglrun run, try starting Slicer without vglrun (it will probably give a bunch of complaints about lack of often openGL, but it should still run), and then give another try.

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 15, 2024, 9:13am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/12 "2024-02-15T09:13:16Z")

</div>

Dear Murat, thank you again for your answer.  
I read your post #227 and your last answer echoes very much what is happening to me. The terminal prompt reads more or less identical to mine.  
I’m working on a calculcation server running linux (CentOS Linux release 7.7.1908 (Core))  
I connect to our calculation server cluster interactively using NoMachine for remote access. Slicer is then executed via a command line instruction `3dsub -q 3d@NAMEOFMACHINE` , targeting a machine with high GPU performance dedicated to us but on which I have little information. Unfortunately, I have a limited understanding or control of our computing environment and administrators are not easily reached.  
How would you run Slicer without vglrun ?  
Normally I just enter ‘3dsub -q 3d@MYMACHINE /MYDIRECTORY/Slicer’

Again, thanks for your help

---

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 15, 2024, 12:23pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/13 "2024-02-15T12:23:36Z")

</div>

@muratmaga running the inference in a separate process might help with this, too. It may be enough to set `LD_PRELOAD` environment variable to empty in the environment that launches the MEMOS inference script.

---

<div class="post-metadata">

**Author:** ![coco](https://avatars.discourse-cdn.com/v4/letter/c/8797f3/32.png) [@coco](https://discourse.slicer.org/u/coco)\
**Post date:** [February 21, 2024, 9:14am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/14 "2024-02-21T09:14:22Z")

</div>

Thanks to you all,  
after a few discussion with the IT people managing our cluster, it turns out I need a separate machine where I could have a GPU with enough RAM and have better control on how to run slicer. I’m now doing this…

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [February 21, 2024, 4:58pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/15 "2024-02-21T16:58:58Z")

</div>

Yes, it is often quite challenging to get Slicer (or any interactive desktop application) work effectively in university HPC systems that are queue based. Try in a local system where you have more control over the computing environment parameters.

---

<div class="post-metadata">

**Author:** ![RosieB](https://avatars.discourse-cdn.com/v4/letter/r/f05b48/32.png) [@RosieB](https://discourse.slicer.org/u/RosieB)\
**Post date:** [April 15, 2024, 2:20pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/16 "2024-04-15T14:20:07Z")

</div>

Hello,  
I am having a similar problem to the previous person. When I try to run MEMOS, it thinks for a little while (~1 minute) then nothing happens.

I will paste in my log file here. I have to admit that it means very little to me.  
I am running Slicer on a Windows 10 computer with 32GB RAM, 6 CPU cores and an NVIDIA RTX A5000 GPU

Grateful for any suggestions.  
Thanks very much  
Rosie

```auto
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Session start time .......: 20240415_144809
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Slicer version ...........: 5.6.2 (revision 32448 / f10cd8c) win-amd64 - installed release
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Operating system .........: Windows / Professional / (Build 19045, Code Page 65001) - 64-bit
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Memory ...................: 32446 MB physical, 58716 MB virtual
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - CPU ......................: GenuineIntel , 12 cores, 12 logical processors
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - VTK configuration ........: OpenGL2 rendering, TBB threading
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Qt configuration .........: version 5.15.2, with SSL, requested OpenGL 3.2 (compatibility profile)
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Internationalization .....: disabled, language=
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Developer mode ...........: disabled
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Application path .........: C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/bin
[DEBUG][Qt] 15.04.2024 14:48:09 [] (unknown:0) - Additional module paths ..: slicer.org/Extensions-32448/MarkupsToModel/lib/Slicer-5.6/qt-loadable-modules, slicer.org/Extensions-32448/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-loadable-modules, slicer.org/Extensions-32448/SegmentEditorExtraEffects/lib/Slicer-5.6/qt-scripted-modules, slicer.org/Extensions-32448/SurfaceWrapSolidify/lib/Slicer-5.6/qt-scripted-modules, slicer.org/Extensions-32448/NvidiaAIAssistedAnnotation/lib/Slicer-5.6/qt-scripted-modules, slicer.org/Extensions-32448/SegmentWithSAM/lib/Slicer-5.6/qt-scripted-modules, slicer.org/Extensions-32448/PyTorch/lib/Slicer-5.6/qt-scripted-modules, slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules
[WARNING][Qt] 15.04.2024 14:48:17 [] (unknown:0) - libpng warning: iCCP: known incorrect sRGB profile
[WARNING][Qt] 15.04.2024 14:48:17 [] (unknown:0) - libpng warning: iCCP: too many profiles
[DEBUG][Python] 15.04.2024 14:48:20 [Python] (C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Slicer-5.6\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:39) - Scripted subject hierarchy plugin registered: SegmentEditor
[DEBUG][Python] 15.04.2024 14:48:20 [Python] (C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Slicer-5.6\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:39) - Scripted subject hierarchy plugin registered: SegmentStatistics
[DEBUG][Qt] 15.04.2024 14:48:20 [] (unknown:0) - Switch to module: "Welcome"
[INFO][Python] 15.04.2024 14:48:22 [Python] (C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/NvidiaAIAssistedAnnotation/lib/Slicer-5.6/qt-scripted-modules/SegmentEditorNvidiaAIAA.py:32) - This plugin dir: C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/NvidiaAIAssistedAnnotation/lib/Slicer-5.6/qt-scripted-modules
[DEBUG][Qt] 15.04.2024 14:48:35 [] (unknown:0) - "Volume" Reader has successfully read the file "D:/microCT on D drive/RECONS E14.5-test_2024_02/E14.5 IMPC examples/20210709_Hpgd-tm1b_E14.5_4.4d_WT_XY_REC_scaled_4.6823_pixel_14.0001.nrrd" "[1.76s]"
[DEBUG][Qt] 15.04.2024 14:48:41 [] (unknown:0) - Switch to module: "MEMOS"
[INFO][Stream] 15.04.2024 14:48:45 [] (unknown:0) - Checking python dependencies
[DEBUG][Python] 15.04.2024 14:48:55 [Python] (C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py:500) - Pillow Python package is required. Installing...
[INFO][Stream] 15.04.2024 14:49:00 [] (unknown:0) - Requirement already satisfied: pillow in c:\users\r.bunton-stasyshyn\appdata\local\slicer.org\slicer 5.6.2\lib\python\lib\site-packages (10.1.0)
[DEBUG][Qt] 15.04.2024 14:49:15 [] (unknown:0) - "Color" Reader has successfully read the file "C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules\\Resources\\Support/KOMP2.ctbl" "[0.02s]"
[INFO][Stream] 15.04.2024 14:49:33 [] (unknown:0) - Using device: 0
[INFO][Stream] 15.04.2024 14:49:33 [] (unknown:0) - MONAI version: 0.9.0
[INFO][Stream] 15.04.2024 14:49:33 [] (unknown:0) - Numpy version: 1.26.1
[INFO][Stream] 15.04.2024 14:49:33 [] (unknown:0) - Pytorch version: 2.2.2+cu118
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - MONAI flags: HAS_EXT = False, USE_COMPILED = False
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - MONAI rev id: af0e0e9f757558d144b655c63afcea3a4e0a06f5
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - MONAI __file__ : C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Python\Lib\site-packages\monai\ __init__.py
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) -
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - Optional dependencies:
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - Pytorch Ignite version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - Nibabel version: 5.2.1
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - scikit-image version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - Pillow version: 10.1.0
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - Tensorboard version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - gdown version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - TorchVision version: 0.17.2+cu118
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - tqdm version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - lmdb version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - psutil version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - pandas version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - einops version: 0.7.0
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - transformers version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - mlflow version: NOT INSTALLED or UNKNOWN VERSION.
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - pynrrd version: 1.0.0
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) -
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - For details about installing the optional dependencies, please visit:
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) - https://docs.monai.io/en/latest/installation.html#installing-the-recommended-dependencies
[INFO][Stream] 15.04.2024 14:49:34 [] (unknown:0) -
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - Using device: cuda
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - Traceback (most recent call last):
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\slicer.org\Extensions-32448\MEMOS\lib\Slicer-5.6\qt-scripted-modules\Scripts\MEMOS_inference.py", line 101, in <module>
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - fire.Fire(main)
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Python\Lib\site-packages\fire\core.py", line 143, in Fire
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - component_trace = _Fire(component, args, parsed_flag_args, context, name)
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Python\Lib\site-packages\fire\core.py", line 477, in _Fire
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - component, remaining_args = _CallAndUpdateTrace(
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Python\Lib\site-packages\fire\core.py", line 693, in _CallAndUpdateTrace
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - component = fn(*varargs, **kwargs)
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\slicer.org\Extensions-32448\MEMOS\lib\Slicer-5.6\qt-scripted-modules\Scripts\MEMOS_inference.py", line 90, in main
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - output_raw = sliding_window_inference(image, (image_dim, image_dim, image_dim), 4, net, overlap=0.8)
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\lib\Python\Lib\site-packages\monai\inferers\utils.py", line 215, in sliding_window_inference
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - output_image_list.append(torch.zeros(output_shape, dtype=compute_dtype, device=device))
[INFO][Stream] 15.04.2024 14:49:48 [] (unknown:0) - torch.cuda.OutOfMemoryError: CUDA out of memory. Tried to allocate 28.18 GiB. GPU 0 has a total capacity of 23.99 GiB of which 18.49 GiB is free. Of the allocated memory 3.09 GiB is allocated by PyTorch, and 53.75 MiB is reserved by PyTorch but unallocated. If reserved but unallocated memory is large try setting PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True to avoid fragmentation. See documentation for Memory Management (https://pytorch.org/docs/stable/notes/cuda.html#environment-variables)
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - Traceback (most recent call last):
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - File "C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py", line 306, in onApplySingleButton
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - labelFilePath = self.launchInference(volumeNode)
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - File "C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py", line 357, in launchInference
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - logic.processInference(tempVolumeFile, self.modelPathSingle.currentPath, outputLabelPath, self.colorNode)
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - File "C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules/MEMOS.py", line 480, in processInference
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - slicer.util.logProcessOutput(proc)
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - File "C:\Users\r.bunton-stasyshyn\AppData\Local\slicer.org\Slicer 5.6.2\bin\Python\slicer\util.py", line 3814, in logProcessOutput
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - raise CalledProcessError(retcode, proc.args, output=proc.stdout, stderr=proc.stderr)
[CRITICAL][Stream] 15.04.2024 14:49:49 [] (unknown:0) - subprocess.CalledProcessError: Command '['C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/bin/../bin\\PythonSlicer.EXE', 'C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer 5.6.2/slicer.org/Extensions-32448/MEMOS/lib/Slicer-5.6/qt-scripted-modules\\Scripts\\MEMOS_inference.py', '--volume-path', "{'image': 'C:/Users/r.bunton-stasyshyn/AppData/Local/Temp/Slicer\\\\tempMEMOSVolume\\\\20210709_Hpgd-tm1b_E14.5_4.4d_WT_XY_REC_scaled_4.6823_pixel_14.0001.nii.gz'}", '--model-path', 'C:/Users/r.bunton-stasyshyn/AppData/Local/slicer.org/Slicer/cache/SlicerIO/best_metric_model_largePatch_noise.pth', '--output-path', 'C:/Users/r.bunton-stasyshyn/AppData/Local/Temp/Slicer\\tempMEMOSOut\\20210709_Hpgd-tm1b_E14.5_4.4d_WT_XY_REC_scaled_4.6823_pixel_14.0001_seg.nii.gz', '--color-node', 'vtkMRMLColorTableNode (000002D396F2D050)\n ID: vtkMRMLColorTableNode1\n ClassName: vtkMRMLColorTableNode\n Name: KOMP2\n Debug: false\n MTime: 253812\n Description: A color table read in from a text file, each line of the format: IntegerLabel Name R G B Alpha\n SingletonTag: (none)\n HideFromEditors: false\n Selectable: true\n Selected: false\n UndoEnabled: false\n Attributes:\n Category:File\n Node references:\n storage [storageNodeRef]: vtkMRMLColorTableStorageNode22\n StorageNodeIDs[0]: vtkMRMLColorTableStorageNode22\n Name: KOMP2\n Type: (File)\n NoName = (none)\n Names array initialised: true\n Color Names:\n 0 background (0, 0, 0, 1)\n 1 left lung (0.772549, 0.647059, 0.568627, 1)\n 2 cranial lobe (0.501961, 0.682353, 0.501961, 1)\n 3 middle lobe (0.945098, 0.839216, 0.568627, 1)\n 4 caudal lobe (0.694118, 0.478431, 0.396078, 1)\n 5 accessory lobe (0.435294, 0.721569, 0.823529, 1)\n 6 left kidney (0.72549, 0.4, 0.32549, 1)\n 7 right kidney (0.72549, 0.4, 0.32549, 1)\n 8 stomach wall (0.847059, 0.396078, 0.309804, 1)\n 9 stomach lumen (0.866667, 0.509804, 0.396078, 1)\n 10 medial lobe of liver (0.564706, 0.933333, 0.564706, 1)\n ...\n Look up table:\n Debug: Off\n Modified Time: 253791\n Reference Count: 1\n Registered Events: \n Registered Observers:\n vtkObserver (000002D397B13590)\n Event: 33\n EventName: ModifiedEvent\n Command: 000002D395C72690\n Priority: 0\n Tag: 2\n vtkObserver (000002D397B14010)\n Event: 2\n EventName: DeleteEvent\n Command: 000002D395C72690\n Priority: 0\n Tag: 1\n Alpha: 1\n VectorMode: Component\n VectorComponent: 0\n VectorSize: -1\n IndexedLookup: OFF\n AnnotatedValues: 0 entries.\n TableRange: (0, 50)\n Scale: Linear\n HueRange: (0, 0.66667)\n SaturationRange: (1, 1)\n ValueRange: (1, 1)\n AlphaRange: (1, 1)\n NanColor: (0.5, 0, 0, 1)\n BelowRangeColor: (0, 0, 0, 1)\n UseBelowRangeColor: OFF\n AboveRangeColor: (1, 1, 1, 1)\n UseAboveRangeColor: OFF\n NumberOfTableValues: 51\n NumberOfColors: 51\n Ramp: SCurve\n InsertTime: 253790\n BuildTime: 0\n Table: \n Debug: Off\n Modified Time: 253536\n Reference Count: 1\n Registered Events: (none)\n Name: (none)\n Data type: unsigned char\n Size: 1040\n MaxId: 203\n NumberOfComponents: 4\n Information: 0000000000000000\n Name: (none)\n Number Of Components: 4\n Number Of Tuples: 51\n Size: 1040\n MaxId: 203\n LookupTable: (none)\n\n']' returned non-zero exit status 1.

```

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [April 15, 2024, 3:49pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/17 "2024-04-15T15:49:38Z")

</div>

Your volume.is too big for your gpu. Downsample by 2 and try again.

---

<div class="post-metadata">

**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [April 16, 2024, 12:37am UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/18 "2024-04-16T00:37:06Z")

</div>

> [@RosieB](#):
>
> it thinks for a little while (~1 minute) then nothing happens.

@muratmaga maybe MEMOS can utilize a try/except to catch `torch.cuda.OutOfMemoryError` errors and present them in a more human readable form instead of relying on users reading traceback messages in the Python console?

---

<div class="post-metadata">

**Author:** ![Mas515](https://avatars.discourse-cdn.com/v4/letter/m/c68b51/32.png) [@Mas515](https://discourse.slicer.org/u/Mas515)\
**Post date:** [July 28, 2026, 10:45pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/19 "2026-07-28T22:45:55Z")

</div>

Hello I am also using Memos for the first time with Dcm files and I get an error I don’t understand. Is it a problem with the metadata in my files? Traceback (most recent call last):

File “C:/Users/Bowling Lab/AppData/Local/slicer.org/3D Slicer 5.12.3/slicer.org/Extensions-34627/MEMOS/lib/Slicer-5.12/qt-scripted-modules/MEMOS.py”, line 302, in onApplySingleButton

logic.setupPythonRequirements()

File “C:/Users/Bowling Lab/AppData/Local/slicer.org/3D Slicer 5.12.3/slicer.org/Extensions-34627/MEMOS/lib/Slicer-5.12/qt-scripted-modules/MEMOS.py”, line 501, in setupPythonRequirements

if not torchLogic.torchInstalled():

^^^^^^^^^^^^^^^^^^^^^^^^^^^

File “C:/Users/Bowling Lab/AppData/Local/slicer.org/3D Slicer 5.12.3/slicer.org/Extensions-34627/PyTorch/lib/Slicer-5.12/qt-scripted-modules/PyTorchUtils.py”, line 162, in torchInstalled

metadataPath = [p for p in importlib.metadata.files(‘torch’) if ‘METADATA’ in str(p)][0]

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

TypeError: ‘NoneType’ object is not iterable

I have actually found a different post recommended installing pytorch via utils. When I open that module, it does show me an error with pytorch (Torch unknown, corrupted installation?) but I am unable to uninstall it even after restarting the application. Failed to uninstall PyTorch. Probably PyTorch is already in use. Please restart the application and try again.

I have tried to uninstall 3D slicer and reinstall pytorch but I still cannot.

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [July 28, 2026, 11:43pm UTC](https://discourse.slicer.org/t/problem-using-memos-extension/34456/20 "2026-07-28T23:43:58Z")

</div>

At this point Memos is not compatible with the newer version of the Slicer due to MONAI API change. If you want to give MEMOS a try, you need to use Slicer 5.8.1 (scroll down to find [Download 3D Slicer | 3D Slicer](https://download.slicer.org/#access-older-releases) section and choose the 5.8.1 for your operating system).

[Next page](https://discourse.slicer.org/t/problem-using-memos-extension/34456.md?page=2)