LT04228 was a diagnostic test PTF created in 2022 in order to save the PSW and registers when a DC002001 abend occurs, and therefore make it easier for support to debug such errors.
Release : 19.0.
LT04228 was never published in that form. It was rescinded and published as LU08702.
Clients that have applied LT04228 will have to remove it in order to be able to apply LU08702 or indeed any other subsequent PTF which replaces RHDCOESA.