Object code

COBOL for AIX programs can call and be called by programs that were compiled using COBOL for AIX Version 2 or Version 3.

You can run programs that were compiled using COBOL for AIX Version 2 or Version 3 with the current COBOL for AIX runtime library.

You cannot run programs that were compiled using the current version of COBOL for AIX with an earlier version of the COBOL for AIX runtime library.