def METHOD_NAME(self, fnumb="", fname="", ext="", **kwargs):
    """Captures field solution options in a command file.
    APDL Command: MFCMMAND
    Parameters
    ----------
    fnumb
        Field number specified by the MFELEM command.
    fname
        Command file name specified for the field number. Defaults to field
        "FNUMB".
    ext
        Extension for Fname. Defaults to .cmd.
    Notes
    -----
    All relevant solution option commands for the specified field are
    written to a file with the extension .cmd. Refer to the commands in the
    following tables in the Command Reference: Analysis Options, Nonlinear
    Options, Dynamic Options, and Load Step Options.
    This command is also valid in PREP7.
    See Multi-field Commands in the Coupled-Field Analysis Guide for a list
    of all ANSYS Multi-field solver commands and their availability for MFS
    and MFX analyses.
    Distributed ANSYS Restriction: This command is not supported in
    Distributed ANSYS.
    """
    command = f"MFCMMAND,{fnumb},{fname},{ext}"
    return self.run(command, **kwargs)