Metahuman For Houdini project breaks on start with errors and empty workspace nodes

Summary

I was using Metahuman For Houdini for grooming. I made a project a few months ago. I started in Houdini 20.5, and migrated to 21 with no issues. Now when I try to open it in 21 again, there are errors “Ignoring data for locked nodes” in all MH Workspace nodes, and all the workspace nodes lost all of their content.

  • I tried rolling back Houdini versions. Doesn’t work.
  • I tried reinstalling/updating Metahuman For Houdini. Doesn’t work.
  • I tried changing asset definitions to the latest ones. Doesn’t work.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Stability

Steps to Reproduce

No idea.

Expected Result

Project breaks.

Observed Result

Project breaks.

Platform(s)

Windows 11, Houdini 20.5/21

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I think it might have to do with metahuman otls version.

The node info shows it’s using an incomplete asset definition. And I don’t have mh_workspace::20.1 now, I only have ::21.0. I believe 20.1 is from earlier versions of Metahuman For Houdini packs. Unfortunately I can’t find them anywhere.