I developed proxy to proxy scenario.
client proxy,program, server proxy are all on the IDES system.
I got error in SXMB_MONI.
<?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="1"> <SAP:Category>XIServer</SAP:Category> <SAP:Code area="INTERNAL">LOOP_IN_MESSAGE_ROUTING</SAP:Code> <SAP:P1>is.00.tfxi7</SAP:P1> <SAP:P2>CENTRAL</SAP:P2> <SAP:P3>XI</SAP:P3> <SAP:P4 /> <SAP:AdditionalText /> <SAP:ApplicationFaultMessage namespace="" /> <SAP:Stack>Loop in message flow found: system is.00.tfxi7, pipeline CENTRAL with inbound adapter XI already processed (see hoplist header)</SAP:Stack> <SAP:Retry>M</SAP:Retry> </SAP:Error>