Problem in WEB SERVICES

Good morning everybody
I've buil a web service from Function module.
I can execute my services from SE37 and It's ok, the problem born when i call my web service from another external custom application.
Infact, when i call my web services the log show: ERROR IN SERIALIZATION.
After very long search I Find that the serialization error born because the parameter order that pass to web services in my application in different from parameter order definited into XML WEB SERVICES file.
for Example:
In my application i pass parameters:
p1, p2, p3
and in XML file i can see:
SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<SOAP-ENV:Body xmlns:ns1="urn:sap-com:document:sap:soap:functions:mc-style">
      <ns1:ZWsMaterialList>
         <P2 xsi:nil="true"/>
         <P3 xsi:nil="true"/>
        <P1>HA01</P1>
     </ns1:ZWsMaterialList>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Using another web services-test-program I can see that if I change xml file with different order, my application start in correct way.
RIGHT CODE:
<SOAP-ENV:Body xmlns:ns1="urn:sap-com:document:sap:soap:functions:mc-style">
      <ns1:ZWsMaterialList>
      <P1>HA01</P1>
      <P2 xsi:nil="true"/>
      <P3 xsi:nil="true"/>
      </ns1:ZWsMaterialList>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>
My ask is: Can i create a WEB SERVICES where the order of parameter isn't foundamental ???
I CAN'T change my custom application because the code is copiled so i can only change my WEB SERVICE.
some helps ???
than you very much
Andrea

Hi Raja,
  I used the tool that you suggest to me, and the results are I expect to be: if I change the order of parameters in the request, web service gives a serialization error.
I include the 2 differents call of my service. The first with the correct order of parameter, and the second changing the order
CORRECT CALL *******************
<?xml version="1.0" encoding="utf-16"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <soap:Body>
    <ZWsMaterialList xmlns="urn:sap-com:document:sap:soap:functions:mc-style">
      <MaterialeBg xmlns="" />
      <MaterialeEn xmlns="" />
      <Tipomat xmlns="">HAWA</Tipomat>
    </ZWsMaterialList>
  </soap:Body>
</soap:Envelope>
RESPONSE
ResponseCode: 200 (OK)
set-cookie:sap-usercontext=sap-client=100; path=/
content-type:text/xml; charset=utf-8
content-length:21112
sap-srt_id:20060321/140843/v1.00_final_6.40/FF064F59782D3B4B969BE0E893537D22
server:SAP Web Application Server (1.0;640)
<?xml version="1.0" encoding="utf-16"?>
<soap-env:Envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
  <soap-env:Body>
    <n0:ZWsMaterialListResponse xmlns:n0="urn:sap-com:document:sap:soap:functions:mc-style">
      <Output>
        <item>
      </Output>
    </n0:ZWsMaterialListResponse>
  </soap-env:Body>
</soap-env:Envelope>
INCORRECT CALL ***************
<?xml version="1.0" encoding="utf-16"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <soap:Body>
    <ZWsMaterialList xmlns="urn:sap-com:document:sap:soap:functions:mc-style">
      <MaterialeEn xmlns="" />
      <MaterialeBg xmlns="" />
      <Tipomat xmlns="">HAWA</Tipomat>
    </ZWsMaterialList>
  </soap:Body>
</soap:Envelope>
RESPONSE
ResponseCode: 500 (Internal Server Error)
set-cookie:sap-usercontext=sap-client=100; path=/
content-type:text/xml; charset=utf-8
content-length:929
sap-srt_id:20060321/140959/v1.00_final_6.40/0AAC3086A117C447B58AAB58E9F7551B
server:SAP Web Application Server (1.0;640)
<?xml version="1.0" encoding="utf-16"?>
<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/WSS0060321101057890000</MainName>
          <ProgName>/1BCDWB/WSS0060321101057890000</ProgName>
          <Line>34 </Line>
          <Valid>X</Valid>
          <MatchFault>
            <DescriptionText>System expected end of element 'ZWsMaterialList'</DescriptionText>
            <TokenType>S</TokenType>
            <TokenName>MaterialeBg</TokenName>
            <TokenNameSpace>
            </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>
Thank you very much.
Regards
Andrea

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