SCPE_IOERR       6402 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7340 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7426 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8763 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8779 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;