Only our current supported version of Telon 5.1 was certified with z/OS 2.2.
If you are running fine with z/OS 1.13, you will probably be fine with z/OS 2.2
If you do have an error with your Operating System upgrade with an unsupported Telon
version, you will have to upgrade to a supported version of Telon.
The problem with z/OS 2.x was that a new version of COBOL 5.x was available, that all versions of Telon
had a problem with.
Telon generated COBOL programs may fail with ABEND U4008. This problem occurs
only if COBOL 5.x version is being used. The fix is only available for Telon 5.1.
Users can upgrade their Operating system, without upgrading their COBOL compile and runtime option.