Error in setDataVariable in Java Embedding

Question

Hi All,
I am trying to write a simple java embedding----
Here is the code.
try{                            
String firstName = ((oracle.xml.parser.v2.XMLElement)getVariableData("inputVariable","payload","/client:JavaEmbeddingBpelProcessRequest/client:input")).getFirstChild().getNodeValue();
addAuditTrailEntry("Inputvalue is"+firstName);
String sConcatString ="Hello!!!"+firstName;
addAuditTrailEntry("OutputString is"+sConcatString);
setVariableData("outputVariable","payload","/client:JavaEmbeddingBpelProcessResponse/client:result",sConcatString);
addAuditTrailEntry("ENDING.....");
catch (Exception e)
e.printStackTrace();
All the Audit trails come in the screen except the last one, just before where i m trying to assign to the result variable.
I get some thing like this in the console:-
Error in <assign> expression :<to> value is empty at line"".The XPath expression:"" returns zero node,when applied to the document shown below.
oracle.xml.parser.v2.XMLElement@64d196
This is a simple code i was trying. This code i found in the threads only, but for me this isnt working.
Can anyone please help me to fix this prob.??
I appreciate all the time n help for this.

Answer 1

Here it comes:::
<schema attributeFormDefault="unqualified"
     elementFormDefault="qualified"
     targetNamespace="http://xmlns.oracle.com/JavaEmbeddingBpel"
     xmlns="http://www.w3.org/2001/XMLSchema">
     <element name="JavaEmbeddingBpelProcessRequest">
          <complexType>
               <sequence>
                    <element name="input" type="string"/>
               </sequence>
          </complexType>
     </element>
     <element name="JavaEmbeddingBpelProcessResponse">
          <complexType>
               <sequence>
                    <element name="result" type="string"/>
               </sequence>
          </complexType>
     </element>
</schema>