Compatibility with earlier and later releases

The PTF for APAR PN74931 replaces the link-edit stubs so that they tolerate Language Environment® service calls. After your application is relinked using the modified C/370™ V2, you can run the application with the C/370 V2R1 runtime library, the C/370 V2R2 runtime library, or the Language Environment runtime libraries.

Before you can relink your C/370-COBOL ILC application with Language Environment services only, you must replace the old library objects @@C2CBL and @@CBL2C, as described in Programs that require the C370 Common Library environment and Linkage editor control statements for modules that contain calls to COBOL routines. After you replace those objects, the affected modules will be executable only with Language Environment services.