Error on Render mantra: Error parsing tag list ('*'): Tag '*' contains invalid characters

[art3mis]

 

Hi

Getting a strange error out put to the console when I try and render a test scene from a tutorial I am following. My scene seems to render ok but the following error appears. Does this indicate an error with my houdini environment (on Windows) or rather is it the .hip file itself causing the issue?

[09:08:20] mantra: Error parsing tag list ('*'): Tag '*' contains invalid characters

[09:14:36] mantra: Error parsing tag list ('*'): Tag '*' contains invalid characters

[09:21:34] mantra: Error parsing tag list ('*'): Tag '*' contains invalid characters

[09:22:57] mantra: Error parsing tag list ('*'): Tag '*' contains invalid characters

Traceback (most recent call last):
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.20/houdini/python2.7libs\nodegraphui.py", line 741, in closeEvent
    self.clearNode()
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.20/houdini/python2.7libs\nodegraphui.py", line 361, in clearNode
    self.node.removeEventCallback(theRecookEvents, self.nodeChangeEvent)
  File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.20/houdini/python2.7libs\hou.py", line 8803, in removeEventCallback
    return _hou.Node_removeEventCallback(*args)
hou.OperationFailed: The attempted operation failed.
The callback was never added