I'm having this houdini console error that says bound set has no valid resources attached with the hair material.
What could be wrong?

I'm using instanced hair sets made from hair generate & process nodes, then copied in SOPs with "pack and instance" in the Copy to Point SOP.

Then I used SOP Import node, enabled "Create Point Instancer".

In the Material Library, I made Karma Material Builder node, then used Karma Hair node.

I assigned the material to the hair geometry





"ERROR: Bound Set has no valid resources attached: set=3 (/materials/hair) binding=0 size=1 name=SimpleMat type=struct NOT SET"

This error shows up like hundreds times rapidly which freezes Houdini.
But if I click multiple times back and forth from the SOP Import node to Karma Render Settings node, sometimes the error doesn't show up at all. Then I can render without any problem. So the render works and material too. It's just this error showing up...