We encountered a fair amount of U4088-63 abends with z/OS v2.4. Relinks were 
required to ensure called utilities by the application were LE-compliant.

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Crusty Old Guy
Sent: Friday, September 30, 2022 8:15 AM
To: [email protected]
Subject: EXTERNAL: COBOL - z/OS 2.1 vs 2.4

We have a client with loadmods that are ancient.  Some are very ancient.  All 
of those loadmods are currently running under z/OS 2.1.
Under z/OS 2.4, some of these loadmods are abending.  Others are creating 
incorrect output.

What could account for this behavior?  What has changed between 2.1 & 2.4?

Regards,
Crusty Old Guy

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