SCPE_SUB         3777 src/simh/scp.c             return SCPE_SUB;
SCPE_SUB         6921 src/simh/scp.c             return SCPE_SUB;
SCPE_SUB         3825 src/simh/sim_tmxr.c         result = SCPE_SUB;                              /* "Subscript out of range" error */