In poser 6 I get this error when running the python script.

:758: Warning: 'yield' will become a reserved keyword in the future
Traceback (most recent call last):
  File "", line 157, in ?
  File "workersmanageMaterials.py", line 9, in ?
    import MatNodes5
  File "", line 758
    yield BaseNode(self,n)
                 ^
SyntaxError: invalid syntax