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


Moving from the VS COBOL II run time

This chapter describes how you can have compatibility and equivalent runtime results for your existing OS/VS COBOL and VS COBOL II programs that have been running in the VS COBOL II run time. It includes information on:
Additional information on moving your run time to Language Environment is included in:
Each section in this chapter indicates whether it is applicable to existing VS COBOL II or OS/VS COBOL programs compiled with the RES compiler option, NORES compiler option (including whether the programs are link-edited with Language Environment), and for applications running on CICS, by listing one or more of the following:
RES
An application comprised of programs compiled with RES.
NORES
An application comprised of programs compiled with NORES. The NORES programs have not been link-edited with Language Environment.

OR

An application comprised of OS/VS COBOL programs compiled with NORES that is link-edited with Language Environment, but does not contain any of the following:
  • A VS COBOL II program
  • An IBM COBOL program
  • An Enterprise COBOL program
  • The IGZCBSN or IGZCBSO bootstrap routine
  • A program using the IGZBRDGE routine
CICS
An application that runs under CICS.
NORES linked
An application comprised of programs compiled with NORES. The NORES programs have been link-edited with Language Environment and now behave as if they were RES. The application does contain at least one of the following:
  • A VS COBOL II program
  • An IBM COBOL program
  • An Enterprise COBOL program
  • The IGZCBSN or IGZCBSO bootstrap routine
  • A program using the IGZBRDGE routine
Note: For multiple load module applications, if the first load module contains one of the above, the application will behave as if it were RES.

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