AE_DETAILS_GET_ERROR

Hi,

I have IDOC scenario, I am getting following error

<SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">

  <SAP:Category>XIServer</SAP:Category>

  <SAP:Code area="INTERNAL">AE_DETAILS_GET_ERROR</SAP:Code>

  <SAP:P1 />

  <SAP:P2 />

  <SAP:P3 />

  <SAP:P4 />

  <SAP:AdditionalText>3: *No service user name found for Integration Server is.XX.XXXX*</SAP:AdditionalText>

  <SAP:Stack>Error while reading access data (URL, user, password) for the Adapter Engine</SAP:Stack>

  <SAP:Retry>M</SAP:Retry>

  </SAP:Error>

I checked in SDN, and as per the expert's views I checked all the possible ways mentioned in following link

http://scn.sap.com/thread/1901389

But still problem persist. Could you please reply the root cause for this issue.