on R23, Win,
c4d.plugins.NodeData.Message will raise
AttributeError: 'function' object has no attribute 'im_func' when the implementation of the method does not (fully) conform to returning a Boolean.
I am not sure if this is considered to be "known", but since the exception comes with no stack frame and is in itself rather cryptic, I thought I document it here. I do not expect an answer in any form. The error message might also be raised erroneously for other methods when the return type is non-conformant. So, dear search function user, when you get this exception, check your
NodeData.Message (and possibly also other overwritten methods) for them always returning the correct return value type (a Boolen in case of