def METHOD_NAME(self):
    """Cannot use pico_convert with more than one file"""
    try:
        ans = pyomo.opt.convert_problem(
            (currdir + "test4.nl", "foo"), None, [pyomo.opt.ProblemFormat.cpxlp]
        )
        self.fail("Expected pyomo.opt.ConverterError exception")
    except pyomo.opt.ConverterError:
        pass