Hi

I’m wondering… on a Windows 11 machine (3090TI with latest NVidia Studio drivers)… is there anything that could be contributing to instability of Python States outside of Houdini? I’ve raised issues with support, but most if not all of them are not reproducible… they happen randomly as you use the software. Yesterday I was messing around with some KineFX nodes (simple stuff, posing etc.) and every 10 or so clicks I get a bunch of errors popping up in the console… most of them related to Python states. I don’t even bother sending to support as the first question is always ‘steps to retro’ as it should be. The challenge is - they are not reproducible…. they happen randomly. Sometimes when you undo, sometimes when you click. You try to do the same thing later or after restart and it works perfectly.

My questions:

1) Is there anything on the machine that could be contributing to this? E.g. errors in the graphics card driver? Errors in mouse driver? Maybe I have some Python installed in addition to Houdini that’s causing this?

2) Are python states errors in general due to how Python states are implemented in Houdini? Would they be more stable if I switched to OpenGL vs Vulcan? I didn’t get a lot of those in 20.0.

3) Is it possible to perhaps in the future rewrite those using something like APEX - for both stability and performance reasons? OR is APEX an architecture that wouldn’t fit this need?

I really do not know where to go with this… I bought 20.5 Indie and it’s been literally to a point where sometimes I don’t want to use the software and just fall back to 20.0.

Thank you
Luke

I would definitely give the OpenGL viewport a try.

APEX won't help, and isn't appropriate anyway--just a completely different technology and purpose.