Arnold Shader Builder don't exist htoa 6.3.3.1

[e_andreWXAXF]

I installed Arnold version 6.3.3.1 for houdini (htoa) for my Houdini 20.5.278 version (I saw on the release note that the version was compatible).
I have access to Arnold rendering and lights, but I can't create a Arnold material builder.

[tom_minor-arnold]

Hey,

What platform are you on? Can you share the htoa.json (or houdini.env) from your houdini20.5 settings folder?

If it's Linux, you need to make sure you've installed the HtoA version for your Houdini gcc version.

[e_andreWXAXF]

I'm on Windows.
I also get errors when I put arnold lights or render nodes.

[tom_minor-arnold]

You're setting HOUDINI_PATH to look for the 20.0.751 version of HtoA, when it should be the 20.5.278 version:

[e_andreWXAXF]

How can I find the version made for Houdini 20.5.278?
What should I do to solve the problem?

[tom_minor-arnold · Accepted solution]

You can find it the Arnold download portal - go to the Arnold >> 2025 >> Extensions tab and search for "HtoA 6.3.3.1 for Houdini 20.5.278 Windows"