Product version migration

If you have a previous version of the compiler, you can replace it with the current version.

Before installing IBM® COBOL for AIX®, V4.1, any previously installed versions of the compiler must be uninstalled. See Uninstalling COBOL for AIX.

If you are upgrading to COBOL for AIX, V4.1 using Installation, any previous versions of the filesets already installed on your system are automatically detected and migrated to the current version.

Once COBOL for AIX, V4.1 is installed, older compiler versions cannot be installed unless V4.1 is uninstalled first.