$ mupip endiancvt mumps.dat -outdb=mumps_cvt.dat
Converting database file mumps.dat from LITTLE endian to BIG endian on a LITTLE endian system

Converting to new file mumps_cvt.dat

Proceed [yes/no] ?

This command detects the endian format of mumps.dat and converts it to the other endian format if you type yes to confirm.