Can't run QT app. (spyder 5.1.5 requires pyqtwebengine<5.13)

[mccoyn]

When I try to run the QT app, it automatically closes without showing anything. It also generates crash dump files for pythonw.exe. Any ideas on how to fix this?

When I installed rayoptics I got this error, which may be related.

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
spyder 5.1.5 requires pyqtwebengine<5.13, which is not installed.

I tried installing PyQtWebEngine and got similar errors.

D:\Temp>C:\ProgramData\Anaconda3\python -m pip install PyQtWebEngine

Collecting PyQtWebEngine
Using cached PyQtWebEngine-5.15.5-cp36-abi3-win_amd64.whl (181 kB)
Requirement already satisfied: PyQt5>=5.15.4 in c:\programdata\anaconda3\lib\site-packages (from PyQtWebEngine) (5.15.6)
Requirement already satisfied: PyQt5-sip<13,>=12.8 in c:\programdata\anaconda3\lib\site-packages (from PyQtWebEngine) (12.9.1)
Requirement already satisfied: PyQtWebEngine-Qt5>=5.15.2 in c:\programdata\anaconda3\lib\site-packages (from PyQtWebEngine) (5.15.2)
Requirement already satisfied: PyQt5-Qt5>=5.15.2 in c:\programdata\anaconda3\lib\site-packages (from PyQt5>=5.15.4->PyQtWebEngine) (5.15.2)
Installing collected packages: PyQtWebEngine
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source >of the following dependency conflicts.
spyder 5.1.5 requires pyqt5<5.13, but you have pyqt5 5.15.6 which is incompatible.
spyder 5.1.5 requires pyqtwebengine<5.13, but you have pyqtwebengine 5.15.5 which is incompatible.
Successfully installed PyQtWebEngine-5.15.5

[mjhoptics]

Hello Nick,
I use spyder also and find that it's very picky with it's dependencies. IIRC it requires pyqt <5.13. What I usually do is install spyder first, which pulls in a ton of dependencies, and then I install ray-optics. This then requires far fewer dependencies to be loaded and everything seems to be happy.
I also use conda, which claims to have better dependency management than pip, but this is still a problem.
Hope this helps.
Mike

[mccoyn]

I had to activate the environment first. I just had to run it from the command window that was created by the "Anaconda Prompt" link in the start menu.

I also found that I could get more information from the error by running "python -m rayoptics.exe" from a command window.

I did also run the following two lines, but I'm not sure if they were necessary. Its been a while since I've done anything with Python so I'm warming up to this a bit.

python -m pip install pyqtwebengine==5.12.1
python -m pip install pyqt5==5.12.3