IBM COBOL for z/OS V5 and later can not live in a PDS library. You must link to a PDS/E Program Object library. This may have consequences. If you are using IGZERRE to establish a resusable run-time environment, you must convert to CEEPIPI.
If you are using ORDER statements in the Binder, they will not behave as expected when the module contains a mixture of COBOL 6 and assembler or COBOL 3 modules. If you are solving dumps without aid of an abend diagnosis product, you will be severely challenged. It is much harder to find your program's working storage in a dump. Do not attempt to debug optimized COBOL 6 code. The compiler drastically rearranges the code path. When debugging, compile as OPT(0). If you are using SuperZAP to zap modules, it takes different commands because the COBOL 6 sections are in a different class name. ...those are the biggest differences that we've hit. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
