Abap server proxy on IS configured as HUB

Question

Hi,
My scenario is;
web serv. client (soap) => XI srv => abap proxy
In the abap proxy I want to return some binary data as attachment. Seems to me that I'm not allowed to execute
abap proxy on the XI IS since the error msg is;
- <SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="1">
  <SAP:Category>XIServer</SAP:Category>
  <SAP:Code area="INTERNAL">PROXY_NOT_ALLOWED_ON_IS</SAP:Code>
  <SAP:P1 />
  <SAP:P2 />
  <SAP:P3 />
  <SAP:P4 />
  <SAP:AdditionalText />
  <SAP:ApplicationFaultMessage namespace="" />
  <SAP:Stack>Proxy calls on the sender or receiver side are not permitted on the IS (client)</SAP:Stack>
  <SAP:Retry>N</SAP:Retry>
  </SAP:Error>
The engine type is configured as HUB.
Can someone confirm this, or is it something I can do?
best regards
Torstein

Answer 1

Hi,
>>>>Are there any configuration settings need to be done for using same client.
yes there's one: TCODE - SXMB_ADM - integration engine config
if you set your client as HUB then you cannot use proxies
if you set it as application server then you can use proxies
but this is not a problem how can you use proxies on the same client but why?
XI is an integration server - use for message transfer not for building applications on it
XI offers many ways to communite with it but not for being an application sever itself
ERP 2004 can have XI on the same instance (server)
but you also need to use another client to work with XI
so most probably this will not change
the conclusion: build your applications on applicaiton servers (r3 for instance) and leave XI for message transfer only
Hope it clears a little  
Regards,
michal
<a href="/people/michal.krawczyk2/blog/2005/06/28/xipi-faq-frequently-asked-questions">XI FAQ - Frequently Asked Questions</a>