Joined: 06 Jun 2008 Posts: 8547 Location: Dubuque, Iowa, USA
First, 4.2 and 5.1 of what? You posted in the ABENDS & Debugging section so there's no indicator of which language you're using. Do you mean COBOL or CICS or what?
Second, COMPILING with REGION=0M does ABSOLUTELY nothing for you -- if the program compiled without REGION=0M, adding it does not change a single thing when you execute the program. Remember that compiling a program and executing the program are two different activities, and while it might have made sense (sort of) to put REGION=0M on the execution, putting it on the compile does not.
Third, is your program a CICS program? If so, this is a very important piece of data for you to not mention -- and there's an APAR that IBM put out about CICS programs and COBOL 5.1 getting a 4093 with reason code 3EC. Googling 4093 reason code 3ec will let you find it.
Fourth, if the APAR doesn't apply to you, you need to open a PMR with IBM to find out what the issue is. You're not likely to get an answer on this (or any) forum.