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The case of the hrender that failed to start AdskLicensingAgent
Or, “things that happen when you use single-user licensing on a render node” In this case, a Houdini command-line render with Arnold (HtoA) failed because the AdskLicensingAgent failed to start....
View ArticleTroubleshooting HtoA installs
If you have a problem like this: HtoA does not show up in Houdini the HtoA material nodes are missing or you get node type errors such as Failed to match node type definition Error: bad node type...
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signal caught: error C0000005 — access violation
People often ask me why they get this error… Unfortunately, there’s no one answer. This is a totally generic error message, and it could be anything. Typically, it’s a bug somewhere. But where? You...
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Failed to register Arnold product
When you click Register in the Arnold License Manager, it runs the Autodesk tool AdskLicensingInstHelper. All Autodesk products use this tool to register themselves with Autodesk licensing. Check the...
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MtoA: Getting an Info-level Arnold log
In the Render Settings, set the log verbosityClick Arnold > Open Arnold RenderView, and then open the Arnold Render LogsIn the Arnold Render Logs window, click IPR Log Frequency > FullWe want...
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The case of Maya and the missing ProductInformation.pit file
One of the strange thing about supporting Arnold at Autodesk is that you have to be a guru-level licensing expert on Autodesk licensing (not RLM, but Autodesk licensing). In this case, Maya 2019 would...
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The case of the too-low OptiX version
In this case, when the user tried to render after enabling the OptiX denoiser, they got this error: ERROR | [gpu] OptiX version 0.30.91 is lower than the minimum required version 5.0.0 This was with...
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[mtoa] Getting a Process Monitor log to troubleshoot problems loading mtoa
If a clean install of MtoA doesn’t work (and the computer does support SSE4.1), then “The specified module could not be found.” usually means there’s a missing dependency. Dependency Walker is a...
View Article[MtoA] Error: defaultArnold Driver can’t create file
You’ll get an error like this if your project path has characters like é or ü or Ô in it. // Error: [driver_exr] defaultArnoldDriver@driver_exr.RGBA: can't create file ".exr": OpenEXR exception:...
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Tracking down the “error initialzing CLM (9)”
It’s not rocket science, but here’s a little application of the scientific method to technical support. Observation The Autodesk licensing system loads AdlmIntRes.xml I used dtruss on macOS and Process...
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C4DtoA not listed in Plugins menu
If you just installed the Windows version of C4DtoA 2.x, and you don’t see C4DtoA in the Plugins menu, it’s probably because you need to install the Visual Studio 2015 redistributable.
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The case of the mesh that wouldn’t displace
Riddle me this: two meshes with the same displacement shader. One has displacement, the other doesn’t. What’s up with that? Your first guess might be that it’s a “padding is at least %x smaller than it...
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[MtoA] UnicodeEncodeError when rendering
If you get this UnicodeEncodeError when you render # Error: line 1: UnicodeEncodeError: file C:\Program Files\Autodesk\Maya2016\bin\python27.zip\encodings\utf_8.py line 16: ascii # it’s probably...
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The case of the 15% rendering utilization
Or, “Understanding the Arnold log, part 23” In this case, a client had very low (15%) CPU usage for a render. We got the Arnold log, and here’s the interesting part: 00:01:44 856MB | OpenImageIO...
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The case of the missing Yeti fur
In this case, a client complained that Arnold wasn’t rendering Yeti fur. I asked him to try with a simple sphere, and to send me the log (at verbosity level Warnings + Info). This what I was looking...
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[MtoA] The case of the machine that was unable to dynamically load mtoa.mll
In this case, a Windows 7 machine did support SSE4.2, but Maya 2017 still couldn’t load mtoa.mll. I didn’t get a full Process Monitor log from the client, but I did get a Dependency Walker log, and...
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[MtoA] Unable to dynamically load : mtoa.mll The specified module could not...
I have another, more general, version of this post here. This one is for new Arnold users with Maya 2017. Here’s what to do if you get errors like this: // Error: file: C:/Program...
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[MtoA] The renderer ‘arnold’ used by this scene, is not currently available
// Warning: file: C:/Program Files/Autodesk/Maya2017/scripts/others/supportRenderers.mel line 64: The renderer "arnold" used by this scene, is not currently available. The "mayaSoftware" renderer will...
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[Arnold] [MtoA] How to check if your processor supports SSE4.2
This blog post is for Google search to find; I’ve already blogged about the SSE4.2 requirement elsewhere. If your processor does not support SSE4.2, the Arnold won’t run on your computer. MtoA will...
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[MtoA] The curse of pymel.log
PyMEL is great. But…if pymel.log can’t be accessed, any plugin that uses PyMEL will fail to load. And MtoA uses PyMEL, so every now and again I see a case where MtoA doesn’t load, and you get something...
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