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Maximilian Schönherr avatar image
Maximilian Schönherr asked ·

Maya 2020.4 and MtoA problem

hi there, i am a maya tutor (uhr24 on youtube) and run the student version of maya 2020.4 on a win 10 machine. since the installation of arnold in it's new version mtoa 4.2.0. several problems have occured, the most obvious one: when i render the scene using the arnold > render option i get a black window and this error message:

Warning: arnold_bifrost.dll was compiled against non-compatible Arnold 6.0.0.0

i can render the scene with the IPR icon right next to the render settings icon. what is this error message about?

error
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Stephen Blair avatar image
Stephen Blair answered ·

Get the latest Bifrost to use with MtoA 4.2
https://area.autodesk.com/bifrost/downloads/

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·

since i seem to be not the only one (even in mid february 2021), let's keep the topic open. i run the current versions of both bif and MtoA on my home PC (a powerful machine running the current win 10 edition). and i'm reluctant to install the updates on my studio PC which i use for my tutorial lessons.

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Do you mean this?

# Warning: [mtoa] Output driver 1 for AOV "RGBA" is null #

and the Invalid image file error?




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no, i don't get this error message any more, since installing BIF 2.2.02 and MtoA 4.2.0. but what i demonstrate in my (unlisted) video is still happening: i invoke the rendering via the arnold menu – and get a black rendering. IPR (via the rendering icons) does work.

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Stephen Blair avatar image Stephen Blair ♦♦ Maximilian Schönherr ·

So that bifarnolddispute.zip scene will render black?
Did you post a full log for one these black renders? I couldn't find it.

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oh, i was just trying the IPR option, and guess what the yellow status line said?


# Warning: [mtoa] Output driver 1 for AOV "RGBA" is null

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Sam Barry avatar image
Sam Barry answered ·

Any further luck resolving this issue? I'm having the exact same problem.

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·

hi folks, i did a total un- and re-installation of maya 2020.4, the arnold mtoa and the bifrost extension. after the fresh installation of maya, followed by the installation of mtoa and bif ... the problem remains.

the bif extension landed in C:\Program Files\Autodesk\Bifrost/Maya2020\2.2.0.2\bifrost\plug-ins

arnold: C:\Program Files\Autodesk\Arnold\maya2020

i don't want to bore you with a local problem. i guess maya 2020.5 or 2021 will come out sooner or later.

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·

i have two windows machines, one in my studio, one at home. the one in the studio is still using the previous versions of arnold and bifrost. the one at home is up to date and shows the render problem. i'm reluctant to update the studio machine, and better wait for others having the same problem ... solved.

2 comments
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Upload a simplified version of the problem scene?

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bifArnoldDispute.zipthe scene i showed you is as simple as possible anyway. the problem happens with all scenes.

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·

hi stephen, thanks for the info. i updated bif to 2.2.0.2, but the problem remains. i get a black window when i render using Arnold → Render. i can render using the IPR icon next to the render settings icon, but not, as usual, via the Arnold menu.

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So you still get this?

WARNING |  arnold_bifrost.dll was compiled against non-compatible Arnold 6.0.0.0


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i don't get that specific error message any more, but a black render window. see this (unlisted, temporary) video: https://youtu.be/bUJRRXNJKOE

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No problem here with the update, you may add this variable:
BIFROST_ARNOLD_PATH = point to extensions\bifrost\1.5.0
mine look like this:
BIFROST_ARNOLD_PATH= C:\Solidangle\MtoA\maya2020\extensions\bifrost\1.5.0
Hope this help!

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this is the error message i see: # Warning: [mtoa] Output driver 1 for AOV "RGBA" is null #

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Stephen Blair avatar image Stephen Blair ♦♦ Maximilian Schönherr ·

The bifrost update wouldn't cause that.
The Output driver warning is because of the Maya Render View.

Can you get a Info-level Arnold log?

arv-log.png

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·
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Christoph Schaedl avatar image
Christoph Schaedl answered ·

Bifrost needs an update. Autodesk is working on it.

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rachid Hadj Abderrahmane avatar image
rachid Hadj Abderrahmane answered ·

no idea! ask Adsk

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Maximilian Schönherr avatar image
Maximilian Schönherr answered ·

when is the maya update coming out?

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