# Critical Qt error on start-up of just-downloaded preview 4.13.0-2021-05-29

**URL:** <https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913>\
**Category:** Support\
**Created:** [June 2, 2021, 12:58am UTC](https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913 "2021-06-02T00:58:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mikebind](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Post date:** [June 2, 2021, 12:58am UTC](https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913/1 "2021-06-02T00:58:14Z")

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On start-up of a freshly downloaded preview release (no extensions, no extra modules added, no actions taken within Slicer after opening), I get a number of errors saying “setViewLabel should be called before setViewNode”. Here is the full log file:

> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Session start time …: 2021-06-01 17:49:20  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Slicer version …: 4.13.0-2021-05-29 (revision 29934 / 7cce89a) win-amd64 - installed release  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Operating system …: Windows / Professional / (Build 19041, Code Page 65001) - 64-bit  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Memory …: 32499 MB physical, 55027 MB virtual  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - CPU …: GenuineIntel , 12 cores, 12 logical processors  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - VTK configuration …: OpenGL2 rendering, TBB threading  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Qt configuration …: version 5.15.1, with SSL, requested OpenGL 3.2 (compatibility profile)  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Developer mode enabled …: yes  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Prefer executable CLI …: yes  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Application path …: C:/Users/mikeb/AppData/Local/NA-MIC/Slicer 4.13.0-2021-05-29/bin  
> [DEBUG][Qt] 01.06.2021 17:49:20 (unknown:0) - Additional module paths …: (none)  
> [CRITICAL][Qt] 01.06.2021 17:49:24 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:24 (unknown:0) - setViewLabel should be called before setViewNode !  
> [DEBUG][Python] 01.06.2021 17:49:25 [Python] (C:\Users\mikeb\AppData\Local\NA-MIC\Slicer 4.13.0-2021-05-29\lib\Slicer-4.13\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: Annotations  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:25 (unknown:0) - setViewLabel should be called before setViewNode !  
> [DEBUG][Python] 01.06.2021 17:49:26 [Python] (C:\Users\mikeb\AppData\Local\NA-MIC\Slicer 4.13.0-2021-05-29\lib\Slicer-4.13\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentEditor  
> [DEBUG][Python] 01.06.2021 17:49:26 [Python] (C:\Users\mikeb\AppData\Local\NA-MIC\Slicer 4.13.0-2021-05-29\lib\Slicer-4.13\qt-scripted-modules\SubjectHierarchyPlugins\AbstractScriptedSubjectHierarchyPlugin.py:36) - Scripted subject hierarchy plugin registered: SegmentStatistics  
> [CRITICAL][Qt] 01.06.2021 17:49:26 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:26 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:26 (unknown:0) - setViewLabel should be called before setViewNode !  
> [DEBUG][Qt] 01.06.2021 17:49:26 (unknown:0) - Switch to module: “Welcome”  
> [CRITICAL][Qt] 01.06.2021 17:49:27 (unknown:0) - setViewLabel should be called before setViewNode !  
> [CRITICAL][Qt] 01.06.2021 17:49:27 (unknown:0) - setViewLabel should be called before setViewNode !

I get these errors on the stable release, but had assumed they had probably been fixed in the preview. I just updated to the preview and still see them. They don’t seem to have any effect in the stable I have been using for months, but they also seem like they should be easy to fix, for someone who knows where to look.

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**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:** [June 2, 2021, 1:01am UTC](https://discourse.slicer.org/t/critical-qt-error-on-start-up-of-just-downloaded-preview-4-13-0-2021-05-29/17913/2 "2021-06-02T01:01:16Z")

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The problem commit is probably the same one I posted about in [Slice intersections appear white in 3D view when no volume displayed · Issue #5550 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/5550)