SCPE_IOERR       6380 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7318 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7404 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8741 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8757 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;