When you bring up a CICS region with Language Environment, you must ensure the module names listed in Language Environment CEECCSD are defined in the CSD. You can locate CEECCSD in SCEESAMP. If you use CICS Version 4 autoinstall facility, you do not need to define Language Environment modules manually in the CSD.
In order to run a Enterprise PL/I CICS application, you need to define the Enterprise PL/I member event handler CEEEV011 in the CICS CSD definition table:
DEFINE PROGRAM(CEEEV011) GROUP(CEE) LANGUAGE(ASSEMBLER) DEFINE PROGRAM(IBMPAM24) GROUP(CEE) LANGUAGE(ASSEMBLER)
In order to debug a PL/I transaction using Debug Tool, you need to define the Debug Tool APIs in the CICS CSD definition table:
DEFINE PROGRAM(IBMPDAPI) GROUP(CEE) LANGUAGE(ASSEMBLER)