Modules of other MVS products in the MVS linklist

There are some DFSMS modules that CICS® loads from the MVS™ linklist. This requirement is either dependent on the function you are using (such as backup-while-open (BWO) support), or on the release of DFSMS. The modules are:

IGWABWO
This module, supplied in the MVS callable services library, SYS1.CSSLIB, is loaded by CICS from the MVS linklist if you are using BWO for files accessed in non-RLS mode.
Note:
In addition to IGWABWO being in the linklist, IGWAMCS2 must be installed in the LPA. CICS tests for the presence of this module in the LPA to determine that BWO support is present in the MVS image before attempting to load IGWABWO.

For files that are accessed in RLS mode, CICS does not require IGWABWO or IGWAMCS2.

IGWARLS
CICS loads this module, supplied in the MVS callable services library SYS1.CSSLIB, from the MVS linklist. CICS issues the following message if it can not load IGWARLS:
      DFHFC0116 APPLID THE LOAD OF CALLABLE
                SERVICE IGWARLS HAS FAILED WITH RETURN CODE
                X'EEEE'.
 

CICS initialization fails if CICS cannot load this callable services module.

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