The CICS environment supports the use of Enterprise COBOL and Language Environment beginning with CICS Transaction Server, Version 2 or later. You can compile and execute CICS command-level application programs. (CICS macro-level programs will neither compile with Enterprise COBOL, nor execute with Language Environment. The CICS Application Migration Aid can help with this conversion. For details, see CICS Application Migration Aid.)
OS/VS COBOL programs will be more difficult to use with CICS in the future. Starting with CICS TS Version 2.2, you can no longer use the CICS Translator for OS/VS COBOL programs. Therefore, if a program needs to be changed, it must be translated with an older version of CICS Translator or be upgraded to Enterprise COBOL.
Starting with CICS TS Version 3, you will not be able to run OS/VS COBOL programs under CICS even in Language Environment, because OS/VS COBOL programs that run under CICS require special support from the CICS product and from Language Environment. In CICS TS Version 3, this special support will not be available.
Any OS/VS COBOL programs that run under CICS should be upgraded to Enterprise COBOL.