DFHEIC
For CICS/ESA releases earlier than 4.1, DFHEIC is the EXEC interface processor for interval control commands. It is called by DFHEIP.
For CICS/ESA release 4.1 and later, DFHEIC becomes DFHEIIC, which is the interface processor for interval control commands.
Reference Sources
CICS Version 1.7, Diagnosis Reference, LC33-0105.
CICS/ESA Version 3.1.1, Diagnosis Reference, LY33-6072.
CICS/ESA Version 4.1, Diagnosis Reference, ZES1-1716.