Hi MJ,
I’ve just tried your test, and this is the result (I ran everything in BATCH I should admit):
Page 1
#CARRID1 #CARRID2
CCC DDD
I think you just need to replace EXIT PROGRAM by STOP RUN since your COBOL program is NOT a CICS program as Klaus Kraft fairly mentioned.
I did not use any SET CONTROL in my NATURAL program
Hope it will help you.
Regards,
NK