## E. Re-Generating the Impedance File: TRPCP, TRPCP2, TRSLS

For active structures, in case the parallel impedance file (.RPCP file) is accidentally deleted or corrupted, the userdoes not need to rerun the job. Because all valuable data is saved in the .SY4 file, this impedance file can be recreated with the TRPCP program. Alternatively, if the symmetries detected bythe solver are incorrect, the user can force the symmetry factor with the helpof the TRPCP2 program. When the structure ismagnetostrictive, it is preferable to deal with series impedance. The TRSLS program is thus useful to regenerate a series impedancefile (.RSLS file).