# 2021.02.23 Hangout

**URL:** https://discourse.slicer.org/t/2021-02-23-hangout/16144
**Category:** Weekly meetings
**Created:** [February 22, 2021, 10:25pm UTC](https://discourse.slicer.org/t/2021-02-23-hangout/16144 "2021-02-22T22:25:39Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)
#### Post date: [February 22, 2021, 10:25pm UTC](https://discourse.slicer.org/t/2021-02-23-hangout/16144/1 "2021-02-22T22:25:39Z")

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Tomorrow, we will be having our next weekly hangout at 10:00 AM ET until 11 AM ET.

Anyone is welcome to join to ask questions at [https://bit.ly/slicer-googlemeet-hosted-by-kitware](https://bit.ly/slicer-googlemeet-hosted-by-kitware)

Agenda:

- Slicer 5 / VTK9
- [Can't install Osteotomy Planner extension](https://discourse.slicer.org/t/cant-install-osteotomy-planner-extension/16149)

Feel free to post to this thread to request/suggest a topic!

Thanks  
Sam and J-Christophe

---

<div class="post-metadata">

### Author: ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)
#### Post date: [February 23, 2021, 3:11pm UTC](https://discourse.slicer.org/t/2021-02-23-hangout/16144/2 "2021-02-23T15:11:17Z")

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ELF alignment errors:

> <https://github.com/Slicer/Slicer/issues/5474>
>
> When starting slicer I get a lot of errors concerning the numpy C-extensions.
> .…..
> Importing the numpy C-extensions failed.
> ...
> Original error was: 
> 
> \`\`\`
> libgfortran-2e0d59d6.so.5.0.0:
> ELF load command address/offset not properly aligned
> \`\`\`
> 
> Workaround:
> 
> \`\`\`
> install -c -s /usr/lib/libgfortran.so.5.0.0 \\
> /opt/3dslicer/lib/Python/lib/python3.6/site-packages/numpy.libs/libgfortran-2e0d59d6.so.5.0.0
> \`\`\`
> 
> I also did:
> 
> \`\`\`
> install -c -s /usr/lib/gcc/x86\_64-pc-linux-gnu/5.5.0/libgfortran.so.3.0.0 \\
> /opt/3dslicer/lib/Python/lib/python3.6/site-packages/scipy.libs/libgfortran-ed201abd.so.3.0.0
> \`\`\`
> 
> After this slicer is starting without error messages.
> 
> Regards
> Wolfgang

> [@Slicer-4.11.20200930: Can't import pip-installed Pillow on Linux](https://discourse.slicer.org/t/slicer-4-11-20200930-cant-import-pip-installed-pillow-on-linux/14448):
>
> Hi all, I can’t run the line below in the current Linux stable (and preview) release, after running pip\_install('Pillow'): \>\>\> from PIL import Image Traceback (most recent call last): File "\<console\>", line 1, in \<module\> File "/home/fernando/opt/Slicer-4.11.20200930-linux-amd64/lib/Python/lib/python3.6/site-packages/PIL/Image.py", line 94, in \<module\> from . import \_imaging as core ImportError: /home/fernando/opt/Slicer-4.11.20200930-linux-amd64/lib/Python/lib/python3.6/site-packages/…