# Slicer 4.11.0 missing modules after crash

**URL:** <https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760>\
**Category:** Support\
**Created:** [January 9, 2020, 3:19pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760 "2020-01-09T15:19:40Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Camiel](https://avatars.discourse-cdn.com/v4/letter/c/7ab992/32.png) [@Camiel](https://discourse.slicer.org/u/Camiel)\
**Post date:** [January 9, 2020, 3:19pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/1 "2020-01-09T15:19:40Z")

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Hello,

I have been using Slicer for a while with great success. However, yesterday, my computer crashed while i was running Slicer together with some other programs. When i tried to reload Slicer, i noticed several modules missing in the modules list. I also noticed aproximately 50 critical errors in the log.  
I have little knowledge about software debugging so i have no idea where to start or what information to provide…

Slicer version: 4.11.0-2019-06-14 r28295  
Windows 10 x64  
Some of the error messages:  
Traceback (most recent call last):  
File “”, line 1, in   
NameError: name ‘getSlicerRCFileName’ is not defined

Traceback (most recent call last):  
File “E:/Camiel/Uni/Stage II - OCON/Programma’s/Slicer/Slicer 4.11.0-2019-06-14/bin/…/lib/Slicer-4.11/qt-scripted-modules/CompareVolumes.py”, line 25, in **init**  
“”").substitute({ ‘a’:parent.slicerWikiUrl, ‘b’:slicer.app.majorVersion, ‘c’:slicer.app.minorVersion })  
AttributeError: module ‘slicer’ has no attribute ‘app’

qSlicerPythonCppAPI::instantiateClass - [“CompareVolumes”] - Failed to instantiate scripted pythonqt class “CompareVolumes” 0x1958c278398  
Fail to instantiate module “CompareVolumes”

Traceback (most recent call last):  
File “E:/Camiel/Uni/Stage II - OCON/Programma’s/Slicer/Slicer 4.11.0-2019-06-14/bin/…/lib/Slicer-4.11/qt-scripted-modules/DICOM.py”, line 34, in **init**  
self.parent.helpText += self.getDefaultModuleDocumentationLink()  
File “E:\Camiel\Uni\Stage II - OCON\Programma’s\Slicer\Slicer 4.11.0-2019-06-14\bin\Python\slicer\ScriptedLoadableModule.py”, line 52, in getDefaultModuleDocumentationLink  
self.parent.slicerWikiUrl, slicer.app.majorVersion, slicer.app.minorVersion, docPage)  
AttributeError: module ‘slicer’ has no attribute ‘app’

qSlicerPythonCppAPI::instantiateClass - [“DICOM”] - Failed to instantiate scripted pythonqt class “DICOM” 0x1958c27cd58  
Fail to instantiate module “DICOM”

Traceback (most recent call last):  
File “”, line 1, in   
File “E:\Camiel\Uni\Stage II - OCON\Programma’s\Slicer\Slicer 4.11.0-2019-06-14\lib\Python\Lib\imp.py”, line 170, in load\_source  
module = \_exec(spec, sys.modules[name])  
File “”, line 618, in \_exec  
File “”, line 678, in exec\_module  
File “”, line 219, in \_call\_with\_frames\_removed  
File “E:/Camiel/Uni/Stage II - OCON/Programma’s/Slicer/Slicer 4.11.0-2019-06-14/bin/…/lib/Slicer-4.11/qt-scripted-modules/DICOMPatcher.py”, line 3, in   
from **main** import vtk, qt, ctk, slicer  
ImportError: cannot import name ‘vtk’

Can anyone help me repair my Slicer? I read somewhere that reinstalling Slicer wont fix this since some files must be deleted or replaced or whatsoever?

Thanks in advance!

Camiel

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [January 9, 2020, 3:41pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/2 "2020-01-09T15:41:35Z")

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It looks like your disk got corrupted. Probably need to run some repair tool. Yes, reinstalling Slicer is a good idea too.

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<div class="post-metadata">

**Author:** ![Camiel](https://avatars.discourse-cdn.com/v4/letter/c/7ab992/32.png) [@Camiel](https://discourse.slicer.org/u/Camiel)\
**Post date:** [January 13, 2020, 8:47am UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/3 "2020-01-13T08:47:50Z")

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@pieper Thanks for the reaction.

I have tried running repair tools but those didn’t find any corupted or broken files. I have also tried reinstalling Slicer. i have tried reinstaling the same version and also the most recent version. those, however, both showed the same problems.

Do you have any other suggestions?

Thanks in advance!

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [January 13, 2020, 4:32pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/4 "2020-01-13T16:32:46Z")

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Ah, it looks like you installed Slicer in a directory with spaces and an apostrophe - that is probably the issue.

`E:/Camiel/Uni/Stage II - OCON/Programma’s/`

When you run the installer can you pick a place like `e:\slicer` or similar?

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**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:** [January 13, 2020, 7:20pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/5 "2020-01-13T19:20:17Z")

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Good catch - special characters in the path is a likely root cause of the issue. There are some more application startup troubleshooting instructions here: [https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/Troubleshooting#Debugging\_Slicer\_application\_startup\_issues](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/Troubleshooting#Debugging_Slicer_application_startup_issues)

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<div class="post-metadata">

**Author:** ![Camiel](https://avatars.discourse-cdn.com/v4/letter/c/7ab992/32.png) [@Camiel](https://discourse.slicer.org/u/Camiel)\
**Post date:** [January 14, 2020, 7:45am UTC](https://discourse.slicer.org/t/slicer-4-11-0-missing-modules-after-crash/9760/6 "2020-01-14T07:45:34Z")

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Changing the install folder indeed solved the issue!  
Thanks for the help!