Question About IDOC ADAPTER

Question

I test a scenario as file->xi->IDOC->R/3
and another scenario as R/3->IDOC->XI-file
i think, it should be two Communication channel
to R/3,one is Receiver another is  Sender
But when i create the channel ,after select the adapter
tyep as IDOC, i can not select the Channel as a  Sender
Can only set it as a Receiver
why?
and when i test the first scenario , the flowing error
appers(my test idoc message is 'CREMAS03':
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
- <!--  Call Adapter
  -->
- <SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">
  <SAP:Category>XIAdapter</SAP:Category>
  <SAP:Code area="IDOC_ADAPTER">ATTRIBUTE_IDOC_RUNTIME</SAP:Code>
  <SAP:P1>I:IDOC_ADAPTER:209 66609E10320A11D9ABCB000F1F6BBAD1 E1LFA1M</SAP:P1>
  <SAP:P2 />
  <SAP:P3 />
  <SAP:P4 />
  <SAP:AdditionalText />
  <SAP:ApplicationFaultMessage namespace="" />
  <SAP:Stack>Fehler: I:IDOC_ADAPTER:209 66609E10320A11D9ABCB000F1F6BBAD1 E1LFA1M</SAP:Stack>
  <SAP:Retry>M</SAP:Retry>
  </SAP:Error>
all of setting seems fine.

Answer 1

The IDOC adapter does not need a sender channel, as all information the XI needs are stored in the message itself. Sender channels are requested mostly for polling adapters like file of jdbc. HTTP-, RFC-, IDOC- and XI-adapter do not need a sender channel (see manual for further details).
The error message seem not to be translated in your system. Here is the message text:
"MSGGUID &1: Control record must start with tag EDI_DC40, not &2"
So in the payload there is no control record for the IDOC.
Check in your IDOC receiver channel, if the checkbox "Apply Control Record Values from Payload" is marked. If so, uncheck it. That should help.
Regards
Stefan