Setting up the link list data set (SEQAMOD)

The hlq.SEQAMOD data set must be in the load module search path whenever you debug a program with z/OS® Debugger. Except for two cases, it will be convenient for your users if you put hlq.SEQAMOD in the system link list concatenation. The exceptions are:
  • CICS®, where hlq.SEQAMOD must be placed in the DFHRPL concatenation. See Adding support for debugging under CICS.
  • When the z/OS Debugger Setup Utility component of the IBM® z/OS Debugger Utilities ISPF function is used to start the debugging session (where DTSU accesses hlq.SEQAMOD for you).

In all other cases, unless you put hlq.SEQAMOD in the system link list concatenation, the user will have to alter the execution environment of any program being debugged so that hlq.SEQAMOD is in the load module search path (such as placing it in JOBLIB, STEPLIB, ISPLLIB or via use of TSOLIB). Therefore, it is recommended that you add the hlq.SEQAMOD data set to the system link list concatenation1. For CICS, you also need to mark hlq.SEQAMOD as APF-authorized1.

Unless you put hlq.SEQAMOD in the system link list concatenation, the user will have to alter the execution environment of any program being debugged so that hlq.SEQAMOD is in the load module search path (such as placing it in JOBLIB, STEPLIB, ISPLLIB or via use of TSOLIB). Therefore, it is recommended that you add the hlq.SEQAMOD data set to the system link list concatenation1.

hlq.SEQAMOD must be placed before any other library in the load module search path that contains CEEEVDBG for z/OS Debugger to get control of a debug session.