Http server code 401 reason Unauthorized

Question

Hi,
I am trying to setup a scenario of sending an IDOC from R/3 to XI and then sending it further to a 3rd party program using the HTTP Channel.
If I go to transaction IDX5 in XI, I can see my IDOC sitting there as Inbound.  When I check the error message on it, I get the message "Http server code 401 reason Unauthorized explanation Unauthorized"  Also further along on the screen it says that the error category is "PLAINHTTP_ADAPTER" and Error ID is "ATTRIBUTE_SERVER". 
Can someone guide me towards a solution?
Thanks in Advance!
Miguel

Answer 1

Hi Rekha,
I have checked the settings and they appear to be correct.
Here is a piece of the trace of the monitor where the error occurs:-
  <Trace level="1" type="T">----
</Trace>
  <Trace level="1" type="T">---- Plain HTTP Adapter Outbound----</Trace>
  <Trace level="1" type="T">----
</Trace>
- <Trace level="1" type="B" name="CL_HTTP_PLAIN_OUTBOUND-ENTER_PLSRV">
  <Trace level="3" type="T">Quality of Service EO</Trace>
  <Trace level="1" type="T">Get XML-Dokument from the Message-Objekt</Trace>
  <Trace level="2" type="T">HTTP-Destination : SBO_ITK</Trace>
  <Trace level="3" type="T">Server pgsap09.sap.pg.co.za</Trace>
  <Trace level="3" type="T">Service-Nr. 80</Trace>
  <Trace level="3" type="T">URL /SBOWebService/xi</Trace>
  <Trace level="3" type="T">~request_method POST</Trace>
  <Trace level="3" type="T">~server_protocol HTTP/1.0</Trace>
  <Trace level="3" type="T">accept: /</Trace>
  <Trace level="3" type="T">content-type: text/xml</Trace>
  <Trace level="3" type="T">msgguid: 2F7389425DBE1711E100000082010B5A</Trace>
  <Trace level="3" type="T">service: DR0</Trace>
  <Trace level="3" type="T">interface namespace: http://sap.com/xi/SBO</Trace>
  <Trace level="3" type="T">interface name: MasterDataFunctionModule__vendorMasterUpdate</Trace>
  <Trace level="3" type="T">quality of service: EO</Trace>
  <Trace level="3" type="T">Header-Fields</Trace>
  <Trace level="3" type="T">Prolog conversion Codepage: UTF-8</Trace>
  <Trace level="3" type="T">Epilog conversion Codepage: UTF-8</Trace>
  <Trace level="3" type="T">content-length 3273</Trace>
  <Trace level="2" type="T">HTTP-Response :</Trace>
  <Trace level="2" type="T">Code : 401</Trace>
  <Trace level="2" type="T">Reason: Unauthorized</Trace>
  <Trace level="2" type="T">Code : 401</Trace>
  <Trace level="2" type="T">Reason: Unauthorized</Trace>
  </Trace>
From this it appears that it is complaining about the user name into the external program, although when I do a test connection in SM59, I get a positive response?
Thanks,
Miguel