Read the RHS File
Read the .rhs file containing the right-hand side vector y representing the method of moments (MoM) excitation.
OPEN (23,  FILE=FNAMEEXT, FORM='UNFORMATTED')
READ  (23,ERR=200) (Y(I), I=1, NSZEILE)
where:- NSZEILE
 - Number of basis functions for MoM as obtained from the .out file or the .mat file.