Abap server proxy on IS configured as HUB

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;

- 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