Compress Data Compression is not supported for compression of IMS-managed ACBs with the exception of the Express component.
Why FDT compression will not be available to use with IMS-managed ACBs environment?
IMSHRINK needs SEGCC coding included DBD, however in IMS-managed ACBs environment would not be allowed such non-standard DBD?
Release : 20.0
Component : Compress Data Compression for IMS
It is correct, Compress Data Compression using IMSHRINK compression routine is currently not supported in IMS-managed ACBs environment.
The SEGCC statement in DBD is the reason.
We have a long-term development plans to add this support to IMS Tools.