I tried to use a Volume-Light to my pyro, but I got an error :
“mantra: Point cloud handle referenced before it was opened. Was pcopen() called?”

I followed this video: https://www.youtube.com/watch?v=eVKODWtBmGc [youtube.com]
and got stuck at 13:50


How can I fix this?

That's a warning, you can ignore it.

I used to get this a lot and never actually figured it out. When I used to get this error the volume light did not work. Can you confirm that it actually is working after the error is received?

By chance are you using a PC iterate loop around the point cloud lookup?

I got this issue too in 19.5. My solution was to change the type in my volume light node to something else than geometry. In my case, I changed it to Point. The downside is that I had to change the shadow intensity and light color manually

richardabielawski
My solution was to change the type in my volume light node to something else than geometry. In my case, I changed it to Point

If you change it from Geometry to Point it will no longer be Volume light but Point light