Error "Deserialisation failed" when trying to use BAPI via a web service

Question

I created a web service in BW with the help from the wizard WS_WZD_START. The web service contains
(among others) the RFC BAPI_ODSO_READ_DATA_UC.
The web service runs OK & can be used from the SAP Web Services Navigator.
Now when i try to use the web service from Delphi i get
an error: "Deserialisation failed" (SimpleTransformationFault) "ODSOBJECT erwartet".
The ODSOBJECT parameter is there to be sure.
I saw the same error before in this forum but found no real solution there. I am using BW 6.40 & SP 12.
XML sent:
<?xml version="1.0" encoding="UTF-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<SOAP-ENV:Header>
<sapsess:Session xmlns:sapsess="http://www.sap.com/webas/630/soap/features/session/">
<enableSession>true</enableSession></sapsess:Session></SOAP-ENV:Header>
<SOAP-ENV:Body><ns1:BAPI_ODSO_READ_DATA_UC xmlns:ns1='urn:sap-com:document:sap:rfc:functions'>
<DATALAYOUT></DATALAYOUT><INFOOBJECTLIST><item>
<INFOOBJECT>/CIVGM/NUM</INFOOBJECT></item></INFOOBJECTLIST>
<MAXROWS>2</MAXROWS><ODSOBJECT>/CIVGM/BPLO001</ODSOBJECT><ORDERBY></ORDERBY>
<RESULTDATA></RESULTDATA><SELECTIONCRITERIA></SELECTIONCRITERIA><UNICODE>N</UNICODE>
</ns1:BAPI_ODSO_READ_DATA_UC></SOAP-ENV:Body></SOAP-ENV:Envelope>
Answer:
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
<soap-env:Body><soap-env:Fault><faultcode>soap-env:Client</faultcode>
<faultstring xml:lang="en">Deserialisation failed</faultstring>
<detail><n0:SimpleTransformationFault xmlns:n0="http://www.sap.com/transformation-templates">
<MainName>/1BCDWB/WSS0050825153239449000</MainName>
<ProgName>/1BCDWB/WSS0050825153239449000</ProgName>
<Line>73 </Line>
<Valid>X</Valid>
<MatchFault>
<DescriptionText>Element 'ODSOBJECT' erwartet</DescriptionText>
<TokenType>S</TokenType>
<TokenName>CODEPAGE</TokenName>
<TokenNameSpace>urn:sap-com:document:sap:rfc:functions</TokenNameSpace>
<TokenValue></TokenValue>
</MatchFault><Caller>
<Class>CL_SRG_RFC_PROXY_CONTEXT</Class>
<Method>IF_SXML_PART~DECODE</Method>
<Positions>1 </Positions>
</Caller></n0:SimpleTransformationFault>
</detail></soap-env:Fault>
</soap-env:Body></soap-env:Envelope>
The same error occurs when I take the exact XML that was sent from Web Services Navigator (the XML that worked) and send that from Delphi.
What could be wrong?

Answer 1

Hi Simon,
   Other thing you can do is compare the HTTP requests (including header) from both Delphi and XMLSPY. I suspect if the SOAP message is same in both case the difference might be in the header. But one thing is certain, WAS can not respond differently for same request, don't you think so ?
Cheers,
Sanjeev