The syntax checker module frosted has a bug for Python 3.5 if args and *kwds arguments are used in python scripts. This is, since the AST module of Python changed a little bit.
In order to not being bothered by this bug, execution errors of frosted are only displayed in debug mode of itom (pythonEngine::pythonSyntaxCheck). This might change if frosted is fixed.
Related issue: https://github.com/timothycrosley/frosted/issues/59
Related information: http://greentreesnakes.readthedocs.io/en/latest/nodes.html#Call