Please use a previous driver version.

What are the steps to reproduce the issue?

Also, consider the latest NVIDIA Drivers are problematic. If you're using the most updated version, consider a downgrade.

That could happen if the new Neural Cache features is used. We've fixed that in the upcoming 5.0 dedicated version, that will replace the current TEST version.

bump

Blender addon version 30.10 - 31.0 beta
Blender verision 4.5.3 - 4.5.5
Singe/multi gpu

Getting this error all the time in any scene by ... stopping and starting IPR rendering :shock:
Octane server restart doesn't help, only full client + server restart fixes it...
but it apears back after ...

It should be ok now.

Sorry about that.
We'll fix this as soon as possible.

No. We will be releasing a TEST version of Octane 2026.1 based on Blender 5.0.
Overall performance is on par with previous versions; however, AOV generation is currently slower, and we are actively working on optimizing that.

The key points are:

No more new custom builds going forward
Focus on ...

Octane 2026.1 will be available as an addon only for Blender 5.0 (current 4.5.5 based version will be discontinued); no new custom builds will be released going forward.
We expect to release a TEST version of Octane 2026.1 for Blender 5.0 in approximately three weeks.

Once the Blender 5.0 ...

Octane 2026.1 will be available as an addon only for Blender 5.0 (current 4.5.5 based version will be discontinued); no new custom builds will be released going forward.
We expect to release a TEST version of Octane 2026.1 for Blender 5.0 in approximately three weeks.

Once the Blender 5.0 ...

Something is definitely wrong. Thanks for your report. We´ll look into that.