def cycfiles(self, fnamerst="", extrst="", fnamerfrq="", extrfrq="",
             **kwargs):
    """Specifies the data files where results are to be found for a cyclic

    APDL Command: CYCFILES
    symmetry mode-superposition harmonic analysis.

    Parameters
    ----------
    fnamerst
        The file name and directory path of the results file from the
        cyclic modal solution. Defaults to Jobname.

    extrst
        File name extension for FnameRst. Defaults to rst.

    fnamerfrq
        The file name and directory path of the results file from the
        cyclic mode-superposition harmonic solution. Defaults to the value
        of the FnameRst argument.

    extrfrq
        File name extension for FnameRfrq. Defaults to rfrq.
    """
    command = f"CYCFILES,{fnamerst},{extrst},{fnamerfrq},{extrfrq}"
    return self.run(command, **kwargs)