<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parametererror(self):
 """Return the first parameter error, or False if there is none"""

        for parametergroup, parameters in self.parameters: #pylint: disable=unused-variable
            for parameter in parameters:
                if parameter.error:
                    return parameter.error
        return False