SCPE_IOERR       6255 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7193 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7279 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8616 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8632 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1089 src/simh/sim_disk.c     return SCPE_IOERR;