SCPE_IOERR       6197 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7135 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7221 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8558 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8574 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1091 src/simh/sim_disk.c     return SCPE_IOERR;