# TotalSegmentator 'Failed to compute results'... 'returned non zero exit status'

**URL:** <https://discourse.slicer.org/t/totalsegmentator-failed-to-compute-results-returned-non-zero-exit-status/34433>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [February 20, 2024, 6:46pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-compute-results-returned-non-zero-exit-status/34433 "2024-02-20T18:46:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![SHMMU](https://avatars.discourse-cdn.com/v4/letter/s/ecae2f/32.png) [@SHMMU](https://discourse.slicer.org/u/SHMMU)\
**Post date:** [February 20, 2024, 6:46pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-compute-results-returned-non-zero-exit-status/34433/1 "2024-02-20T18:46:37Z")

</div>

Operating system: Windows  
Slicer version: 5.6.0 & 5.6.1  
Expected behavior:  
Actual behavior:

 ![thumbnail_IMG_5762](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/3/c3186e4226eb04634e4c858cf8188d5684c0323c.jpeg)  
I have uninstalled, reinstalled different versions of 3D Slicer and the same error message keeps appearing. I am at a loss of what to do to get it working again. Any help would be very appreciated.

---

<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 20, 2024, 7:00pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-compute-results-returned-non-zero-exit-status/34433/2 "2024-02-20T19:00:02Z")

</div>

TotalSegmentator can only segment CT images. Please retry the segmentation on a CT image as described in the [tutorial](https://github.com/lassoan/SlicerTotalSegmentator?tab=readme-ov-file#tutorial).

`Error 120` is often caused by incorrect PyTorch installation. Reinstall the latest Slicer Stable Release (currently 5.6.1) in a new folder and install PyTorch manually as described [here](https://github.com/lassoan/SlicerTotalSegmentator/blob/main/README.md#problem-error-popup-on-the-first-run-failed-to-compute-results--command--pythonslicer-totalsegmentatorexe--returned-non-zero-exit-status-120).

What CPU and GPU do you have?

---

<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:** [February 20, 2024, 11:56pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-compute-results-returned-non-zero-exit-status/34433/3 "2024-02-20T23:56:59Z")

</div>

Please see the following post regarding a required workaround even when using CT images. Note this may change as the various dependencies of the `TotalSegmentator` python package change.

> [@Totalsegmentator failing with error 120](https://discourse.slicer.org/t/totalsegmentator-failing-with-error-120/34434/11):
>
> Aha! So, it is not a too old package, but a too recent package. Unfortunately, developer of dynamic\_network\_architectures broke backward compatibility with a recent update. ResidualEncoderUNet package must be imported as from dynamic\_network\_architectures.architectures.residual\_unet import ResidualEncoderUNet now, but since this change was snuck into a minor version update (0.2 to 0.4) developer of TotalSegmentator did not suspect anything bad would happen. As a workaround, you can downgrade d…