A JCL-initiated MAXSORT can be restarted from a breakpoint if necessary. When MAXSORT is restarted from a breakpoint, the following PARM options cannot be modified: CMP=CPD/CLC, EQUALS, E15/E35=COB, FILSZ, LOCALE, MAXSORT, STOPAFT and TAPENAME. Other PARM options will be accepted if they are specified on the EXEC statement. Only the CORE parameter can be passed through $ORTPARM.
MFX control statements cannot be modified when MAXSORT is restarted. However, the l5, l6 and l7 values on the LENGTH parameter of the RECORD control statement can be altered.