def METHOD_NAME(self):
    '''Optional key with enumerated value should produce syntax error'''
    try:
        # CLBLM_L.SLICEM_X0.AMUXFF.O6 !30_06 !30_07 !30_08 30_11
        self.fasm2frames("CLBLM_L_X10Y102.SLICEM_X0.AFFMUX.O6")
        self.fail("Expected syntax error")
    except TextXSyntaxError:
        pass