IF TALLY = 0 THEN STOP RUN.a false test will cause control to be returned to the caller. With CMPR2 behavior, the result is an abend.
For a main program, the EXIT PROGRAM statement has no effect. Therefore, the implicit EXIT PROGRAM that is generated by the compiler will have no effect on the execution of the program; a main program that executes beyond the last line of the program will still abend.