SCPE_IOERR       6436 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7374 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7460 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8797 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8813 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;