def validate_combine_archive(filename):
    """ Determine if a COMBINE/OMEX archive is valid

    Args:
        filename (:obj:`str`): path to COMBINE/OMEX archive

    Returns:
        :obj:`tuple`:

            * nested :obj:`list` of :obj:`str`: nested list of errors
            * nested :obj:`list` of :obj:`str`: nested list of warnings
    """
    errors = []
    warnings = []

    errors.append([(
        'BioModels entries should not contain COMBINE/OMEX archives. '
        'The BioModels platform automatically generates a COMBINE/OMEX archive for each entry.'
    )])

    return errors, warnings