Hi Dijesh,
to set the application- and persistence engine to XML would be my first idea. But you wrote that this is already checked. Proxy and XML have different methods to transfer the data to AIF.
Method used in Web service endpoint function module: CALL METHOD /aif/cl_enabler_xml=>transfer_to_aif
Application Engine: XML
Persistence Engine: XML
Selection Engine: AIF Index Tables
Logging Engine: AIF Application Log
Does a record with exists in XML GUID 989C6E5C2CC111CAA04408002B1BB4F1 perstance table /AIF/PERS_XML exist?
Best regards
Christoph