SCPE_IOERR       6393 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7331 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7417 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8754 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8770 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;