MAXtoA GPU specific scene with .ass objects renders with Production but fails with ActiveShade

[Lucas_3D]

MAXtoA 4.1.0.71 | 3ds Max 2021.2

I have 260 instanced Arnold Procedural Object's, using my GPU's (2x 1070) the file renders with the Production renderer but fail when using the ActiveShade renderer. If I isolate a few of the Procedural's then the ActiveShade will render. Is there a tip for handling procedural's with ActiveShade and GPU?

What was sent to the .ass file was Geometry and Shaders.

Error follows:

[Arnold]: 00:00:29 10800MB ERROR | [gpu] an error happened during GPU update : Unknown error (Details: Function "bufferUnmap" caught exception: Assertion failed: "( buf->m_allocatedSet & targets ) == targets : Trying to synchronize MBuffer to device without allocation", file: <internal>, line: 2584)

Error while updating scene. Aborting render.

[Stephen.Blair]

@

What about the Arnold Render View? What happens there?

Can you post a full Arnold log for a successful render, and for a render that fails?

[Stephen.Blair]

MAXtoA does do things differently for ActiveShade renders, that's why you're having this problem.

We intend to change that soon. So for now, I would use the Arnold Render View, which I think will work.

[Lucas_3D]

Thank you! I tried out Arnold Render View for the first time, It's a handy VFB I'll keep using it.
Though with the Arnold Procedural Objects it acts similar to the ActiveShade and seems to fail when there are too many of them. I could do 10, 30 but at some point I get a similar error message requiring a restart:

[Arnold]: 00:00:27 10544MB ERROR | [gpu] an error happened during GPU update : Unknown error (Details: Function "bufferUnmap" caught exception: Assertion failed: "( buf->m_allocatedSet & targets ) == targets : Trying to synchronize MBuffer to device without allocation", file: <internal>, line: 2584)

It sounds like you're onto the issue, production renderer with GPU continues to work, I'll check on this in the future.

Thanks very much.