SCPE_IOERR       6367 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       7305 src/simh/scp.c                 reason = SCPE_IOERR;
SCPE_IOERR       7391 src/simh/scp.c                 return SCPE_IOERR;
SCPE_IOERR       8728 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       8744 src/simh/scp.c     return SCPE_IOERR;
SCPE_IOERR       1093 src/simh/sim_disk.c     return SCPE_IOERR;