DFHCRP
DFHCRP is the relay transaction used to route remote transactions to the proper remote CICS address space. The user-replaceable dynamic routing transaction program DFHDYP is invoked directly by DFHCRP.
Starting with CICS/ESA 4.1, DFHCRP is replaced by DFHAPRT, a new CICS transaction routing program, which does not require a program definition in the CSD.
DFHCRP has been moved to the compatibility group DFHCOMP4.
Reference Sources
CICS/ESA Diagnosis Reference Version 3 Release 2.1