SCPE_IOERR       6263 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7201 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7287 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8624 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8640 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1089 src/simh/sim_disk.c     return SCPE_IOERR;