Fatal error clearing key frames in Maya 2017 Vray 3.5

[thebeals]

Every once in a while (I haven't been able to track down what causes it), Vray fatal errors and says "fatal error clearing key frames". The scene is very simple with only 2 keyframes to change camera position.

If I save the scene and re-open it gives the same error and will not render.

Does anyone know how to fix this problem? I couldn't find anything on google.

[thebeals]

Further info:

When I re open the scene, it still gives the error, but if I close maya completely and the re-open everything renders fine.

[t.petrov]

Do you have geometry caching enabled in the Render settings?
What is the exact build you're using?
Can you give us a crash dump?

[thebeals]

Thanks for the response!
I do not have geometry caching enabled.
Plugin version: 3.52.01
I pulled a crash dump from around the date I was experiencing it, but I'm not 100% sure if this dump was caused by the issue or not. I'll try to replicate the crash and send you an updated dump file if it happens again. MayaCrashLog170513.1232.zip

[vlado]

The particular crash in the dump is from a material swatch render. Does disabling the swatch rendering fix it? Either way, what would be a way for us to reproduce the issue?

Best regards,
Vlado

[vlado]

Another question: do you remember if there were any VRayWrapperMtl materials in any of the swatches?

Best regards,
Vlado

[thebeals]

There was a VrayWrapperMtl in that scene, but I just experienced this problem in another scene that did not have the wrapper material. I looked into the temp files, but there was no dump file for this crash, but there was a log file that has the the error reported. I have attached it here. I'm not sure if it will help. I'll keep a look out for a dump file if I experience this problem again. I will try to disable the swatch render and see if that helps, I have not tried that yet.

[thebeals]

I just experienced the problem again and this time it created a dump file. I've attached it here.

[alexanderdespotov]

Currently I'm investigating your problem.
As far as I can see the crash occurs while IPR starts, is it right after another IPR session?
Do you use third party plugins in the scene ? And if yes which ones ?

Best,
Alex

[thebeals]

It seems to happen when I am using IPR, stop it, make some material changes and then start the IPR again. I am not using any third party plugins, I believe. I think everything is native vray. I think in this particular scene I was using nhair, but I've experience the problem in other scenes where I wasn't using nHar.

[alexanderdespotov]

I'm stuck with this.
Can you try with 3.52.03 ? We fixed some bugs with in-process IPR between those 2 version.

Best,
Alex

[vanpixelguy]

Hello,
We're getting that same "Fatal error clearing key frames" message. We are rendering a PhoenixFD smoke simulation with V-Ray for Maya. I'm attaching a scene: if you go Render Settings>Animation and set "Common>Animation>Render animation only in batch? to OFF then render with V-Ray into the Render View you should see the error.
Thanks.
- VPG

[shaio]

Hi,
I'll take a look and check if I can crash it on my end. I'll get back to you as soon as I have some more info.
Thanks for the scene and for the feedback.

[shaio]

I'm not able to reproduce the crash. Is it possible to share a few frames of the phoenix simulation and the Maya, V-Ray and Phoenix versions that you use?

[vanpixelguy]

Hello.
It doesn't crash. It just gives the "Fatal error clearing frames" message and stops.Here is the workflow I am using:

1. Maya 2016.5
2. Open the scene file 2059b.ma
3. Render Settings
4. Set renderer to V-Ray
5. Toggle Common>Animation>Render animation only in batch to OFF
6. Open Mayas Render View and render
   > Get errors in the Maya Script Editor that say "Fatal error clearing frames".

We are using Maya 2016 Extension 2 SP 2. PhoenixFD version 3.04.01. V-Ray for Maya version 3.40.03.
We're trying to get Maya 2018 with VRay 3.60.02 and PhoenixFD up to see if its a fixed issue.

I've included two screenshots:
2059a.jog: what the interactive simulation looks like in the viewport. It works.
2059b.jpg: what happens when you render to the Render View. It seems to render the first frame and you get the keyframe error.

Thanks.