3733662 - PI/PO message fails with XIProxy error INTERFACE_SIGNATURE_ERROR in ABAP Proxy

Messages processed via ABAP Proxy in PI/PO (e.g., monitored in SXMB_MONI or PI runtime) fail with an error similar to:

<SAP:Category>XIProxy</SAP:Category>
<SAP:Code area="ABAP">INTERFACE_SIGNATURE_ERROR</SAP:Code>
<SAP:P1><Interface_Name></SAP:P1>
<SAP:P2><Message_Type></SAP:P2>
<SAP:Stack>
Information about the method parameters is missing for the interface <Interface_Name>
</SAP:Stack>

Or SOAP fault:

Error during conversion of XI message
...
XIProxy INTERFACE_SIGNATURE_ERROR

The interface name, message type, and namespace may vary depending on the integration scenario.

• SAP Process Integration
• SAP Process Orchestration
• SAP Netweaver Java 7.5

INTERFACE_SIGNATURE_ERROR, XIProxy, ABAP Proxy, SPROXY, SXMB_MONI, PI, PO, SAP PI/PO, proxy inconsistency, ESR mismatch, XML namespace, root tag mismatch, Web Service error, SOAP fault, proxy regeneration, interface mismatch , KBA , BC-XI-CON-SOP , SOAP Adapter , Problem