(Resolved) Houdini 20 Error Messages "Error running Python dynamic menu strip script"

V-Ray V-Ray for Houdini General
1

On my laptop I has Vray for Houdini (19.5.403). I just installed a new Houdini version (20.0.547) and blindly created a new Vray shelf (without knowing it does not support Houdini 20 yet). when I launched Houdini (20) I got these error and warning messages. How can I fix this issue? Thank you.

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Error running Python dynamic menu strip script:
Traceback (most recent call last):
File "<stdin>", line 6, in expression
File "C:\Program Files/Chaos Group/V-Ray/Houdini 19.5.403/vfh_home/scripts/python\vfh\vfh_rop.py", line 145, in vray_rops_as_xml_menu_items
VRAY_ROPS = TYPE_VRAY_ROP.instances()
AttributeError: 'NoneType' object has no attribute 'instances'

Warning: Bad operator type when binding handles: Object/VRayNodeSunLight
Warning: Bad operator type when binding handles: Object/VRayNodeLightDirect
Warning: Bad operator type when binding handles: Object/VRayNodeLightAmbient
Warning: Bad operator type when binding handles: Object/VRayNodeLightOmni
Warning: Bad operator type when binding handles: Object/VRayNodeLightSphere
Warning: Bad operator type when binding handles: Object/VRayNodeLightSpot
Warning: Bad operator type when binding handles: Object/VRayNodeLightRectangle
Warning: Bad operator type when binding handles: Object/VRayNodeLightMesh
Warning: Bad operator type when binding handles: Object/VRayNodeLightIES
Warning: Bad operator type when binding handles: Object/VRayNodeLightDome
```​
2

Dear @poramate_chotvararak , hello.

Welcome to Chaos Forums!

You should use the right V-Ray for Houdini version according to the chosen Houdini build.
Please be informed that builds for Houdini 20 are available in our nightlies section, see stables here.
Latest are for Houdini 20.0.506.

Take a look also at the official announcement for the Unified Installer.
With it you will be able to choose the exact Houdini 20 version that you have already installed (when you choose Advanced after starting the Installer).
But even by default V-Ray will be installed for the latest Houdini version available, so a step less for you.
There is no newer than 20.0.547 at the moment in Houdini 20 family.

I have requested for you access to test this too - ticket # 190243 to our Chaos License Management Team.
You will be informed by e-mail about the progress.
And you are able to see the ticket also at our Help Center under My Requests.

Best regards,
TS

3

I installed nightly version, looked through Houdini packages system, and finally managed to get it working. Thank you support team.

4

You are welcome!

Happy last days of 2023.