Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Compiler and Runtime Migration Guide


Applications with COBOL programs compiled with NORES

Existing OS/VS COBOL programs that are compiled with NORES and that do not use ISAM run without change and provide the same results as before. You do not need to link-edit these programs with Language Environment; however, you will not be able to get IBM service support for these NORES applications unless you link-edit these programs with Language Environment.

CALL identifier: If your program contains a CALL identifier statement, the compiler overrides any NORES specification to be RES. This can result in an application with mixed RES and NORES, even if NORES is specified as the installation default.
ISAM: Support was dropped by DFSMS with z/OS V1.7.

If you do link-edit programs compiled with NORES with Language Environment, see Link-editing applications with Language Environment for details on possible changes in behavior.


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