EDI_DC40 Segment Issue

Question

Hi Experts,
Scenario JMS -- XI -- IDOC
I have tested the interface and found it works fine. 
As disabled EDI_DC40 segment in mapping and checked Apply Control record Values from Payload  in the Receiver IDOC communication Channel. Since I have developed this scenario in Dev system and later move it into Quality and Production.
Do I need to disabled EDI_DC40 segement thrugout the mapping or should pouplate with required fieilds like IDOCTYP,MESTYPE,SDNPORT,SDNPRT.....etc
Please throw some light. would appricate your inputs.
Sameer!

Answer 1

As per my understanding:
Case1: If disable EDI_DC40 means Idoc adapter fill itself these values and Apply Control Record Values from Payload option should also be UNCHECKED.
Case2: If Enable EDI_DC40 means fill  these values in mapping itself and Apply Control Record Values from Payload option should be CHECKED.
I disabled EDI_DC40 segments and CHECKED Apply Control Record Values from Payload well it works fine but m wonder if  disable EDI_DC40 segments and UNCHECKED Apply Control Record Values from Payload will also working.
What would be the correct appraoch?
Sameer