cura 4.12 crashes giving me this error when trying to view a sliced .STL

[btketner1 1]

Traceback (most recent call last):

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Qt\Bindings\MainWindow.py", line 255, in _render

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Qt\QtRenderer.py", line 163, in render

File "C:\Program Files\Ultimaker Cura 4.12.0\plugins\SimulationView\SimulationPass.py", line 65, in render

self._layer_shader.setUniformValue("u_active_extruder", float(max(0, self._extruder_manager.activeExtruderIndex)))

AttributeError: 'NoneType' object has no attribute 'setUniformValue'

 

 

 

Thread 0x00001100 (most recent call first):

File "C:\Program Files\Ultimaker Cura 4.12.0\plugins\USBPrinting\USBPrinterOutputDeviceManager.py", line 87 in _updateThread

File "threading.py", line 870 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x000018e4 (most recent call first):

File "threading.py", line 306 in wait

File "zeroconf\__init__.py", line 2534 in wait

File "zeroconf\__init__.py", line 1715 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x00001070 (most recent call first):

File "threading.py", line 306 in wait

File "threading.py", line 558 in wait

File "C:\Program Files\Ultimaker Cura 4.12.0\plugins\UM3NetworkPrinting\src\Network\ZeroConfClient.py", line 81 in _handleOnServiceChangedRequests

File "threading.py", line 870 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x00000e80 (most recent call first):

File "zeroconf\__init__.py", line 1369 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x0000065c (most recent call first):

File "C:\Program Files\Ultimaker Cura 4.12.0\plugins\RemovableDriveOutputDevice\RemovableDrivePlugin.py", line 61 in _updateThread

File "threading.py", line 870 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x000012fc (most recent call first):

File "threading.py", line 302 in wait

File "threading.py", line 433 in acquire

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\JobQueue.py", line 98 in _nextJob

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\JobQueue.py", line 124 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Thread 0x000013e8 (most recent call first):

File "threading.py", line 302 in wait

File "threading.py", line 433 in acquire

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\JobQueue.py", line 98 in _nextJob

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\JobQueue.py", line 124 in run

File "threading.py", line 932 in _bootstrap_inner

File "threading.py", line 890 in _bootstrap

 

Current thread 0x0000150c (most recent call first):

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CrashHandler.py", line 396 in _logInfoWidget

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CrashHandler.py", line 182 in _createDialog

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CrashHandler.py", line 86 in __init__

File "C:\build\Cura\4.12-exe\build\inst\bin\cura_app.py", line 159 in exceptHook

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CrashHandler.py", line 452 in _show

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Event.py", line 218 in call

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Qt\QtApplication.py", line 479 in event

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CuraApplication.py", line 1094 in event

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CrashHandler.py", line 452 in _show

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Event.py", line 218 in call

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Qt\QtApplication.py", line 479 in event

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CuraApplication.py", line 1094 in event

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\UM\Qt\QtApplication.py", line 393 in exec_

File "C:\build\Cura\4.12-exe\build\inst\lib\python3.8\site-packages\cura\CuraApplication.py", line 871 in run

File "C:\build\Cura\4.12-exe\build\inst\bin\cura_app.py", line 233 in <module>

File "Console.py", line 36 in run

File "__startup__.py", line 74 in run

 

[nallath 1,120]

https://support.ultimaker.com/hc/en-us/articles/4402996140946-Ultimaker-Cura-crashes-when-opening-any-file

[btketner1 1]

I don't have Chitubox. It works to slice, I just cannot preview it.

[nallath 1,120]

Ah, sorry. So it's this issue then?

 

[ahoeben 1,948]

Please check this fix:

https://github.com/Ultimaker/Cura/issues/10837#issuecomment-972146096

[btketner1 1]

Yes Sir! Thank you! Fixed both 4.11.0 and 4.12.0

[ahoeben 1,948]

The fix will be included in Cura 4.13