Robert Vinluan


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Recent Forum Posts

Linux Ubuntu 18.04 LTS June 1, 2018, 2:18 p.m.


If it helps, we have 5+ people here in the office that are on Ubuntu 18.04 LTS and they haven't hit any platform-specific crashes or issues in Houdini.


Using PyQt5 for python panels June 1, 2018, 2:13 p.m.


The “DLL load failed: cannot find specified procedure” error is likely due to a compiler version mismatch. Unfortunately on Windows, it is only possible to import compiled Python modules that are compiled with the same Visual Studio compiler version that Houdini is compiled with.

So for Houdini 16.5, the PyQt5 modules must be compiled with Visual Studio 2015 in order for them to work in Houdini.

If you can find pre-built MSVC2015 PyQt5 modules then that would be best. Otherwise you would need to compile PyQt5 from source using MSVC2015 which can be a pain.

The other option is to just use PySide2 which ships with Houdini. The PySide2 API is practically the same as PyQt5.


Hqueue can only write images in $JOB or $HIP directory? June 1, 2018, 2:07 p.m.


What version of Houdini/HQueue are you using? The $HIP/$JOB check was first put in as a way to ensure that jobs sent to the farm wouldn't fail because of a bad or non-existent folder path. It was a very common mistake back in the day for someone to enter a local hard drive path into the Output Picture parameter and then submit a job on the farm that didn't know anything about the local path.

But the $HIP/$JOB check was recently removed starting in build 16.5.350.

So you could try the latest H16.5 production build to get around the error.

As for your setup, with build 16.5.350+ it should be possible. You just need to additionally:
- Configure your Mantra ROP to write out .ifds.
- Turn *off* the Generate IFDs option on the HQueue Render ROP.
- And depending on how many Houdini licenses you have available in your network for IFD generation, check on the “Batch All Frames in One Job” parameter under the Advanced tab of the HQueue Render ROP. Or play around with the “Frames per Job” parameter in the same area.

I hope this helps.