There are different styles (interface types) for calling a COBOL server.

It is important to know the interface type of your COBOL server. If you are unsure, consult a COBOL CICS specialist or see description of interface type in the IDL Extractor for COBOL documentation for details and examples: DFHCOMMAREA Calling Convention | Channel Container Calling Convention | DFHCOMMAREA Large Buffer Interface.

When you are sure which programing style you are using, continue with the appropriate scenario:

• DFHCOMMAREA using

  • CICS ECI (zero footprint)

  • CICS Socket Listener (minimal footprint)

• Channel Container using

  • CICS Socket Listener (minimal footprint)

• Large Buffer using

  • CICS Socket Listener (minimal footprint)