SCPE_IOERR       6185 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7123 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7209 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8546 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8562 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1091 src/simh/sim_disk.c     return SCPE_IOERR;