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Rendering with Arnold in Houdini and Solaris using the HtoA plug-in.
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htoa-6.1.1.1 with Houdini 19.0.589-py3 - Python scripts error

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Message 1 of 2
nicholas_yue
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htoa-6.1.1.1 with Houdini 19.0.589-py3 - Python scripts error

I have successfully installed HtoA on Windows 10 and it shows up in the Houdini 19.0.589-py3 top menu bar.

 

However, when I tried creating Houdini nodes in the UI, I get the following errors

 

```

Traceback (most recent call last):
File "C:/Users/nyue/htoa/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/scripts/obj/geo.py", line 3, in <module>
htoa.properties.initArnoldProperties(kwargs['node'])
File "C:/Users/nyue/htoa/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/scripts/python\htoa\properties.py", line 167, in initArnoldProperties
addArnoldProperties(node)
File "C:/Users/nyue/htoa/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/htoa-6.1.1.1_ra2d41db_houdini-19.0.589.py3/scripts/python\htoa\properties.py", line 111, in addArnoldProperties
node.parm('ar_matte').setExpression('ch("vm_matte")')
AttributeError: 'NoneType' object has no attribute 'setExpression'
```

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Message 2 of 2

This kind of thing is almost always an environment problem.

So, check

  • houdini.env, or if you use packages, the json file
  • Help > About Houdini > Show Details

Remove other stuff and make sure HtoA works. Then add back the other stuff.

  •  


// Stephen Blair
// Arnold Renderer Support

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