SCPE_IOERR       6324 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7262 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7348 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8685 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8701 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;