Error While trying to Get XML element(tag) Values

Question

We are trying to get XML element (TAG) value from the XML pay load.
Example.
Getting XML String from a web service and then converting into XML payload.
ora:parseEscapedXML(bpws:getVariableData('signOn_Out','signOnReturn'))
From this XML payload we are trying to get an element (Tag) value.
We are getting following error
Error in evaluate <from> expression at line "130". The result is empty for the XPath expression : "/client:TririgaProcessResponse/client:User/client:LastName".
oracle.xml.parser.v2.XMLElement@118dc2a
{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure" has been thrown.
- <selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/">
- <part name="summary">
<summary>
empty variable/expression result.
xpath variable/expression expression "/client:TririgaProcessResponse/client:User/client:LastName" is empty at line 130, when attempting reading/copying it.
Please make sure the variable/expression result "/client:TririgaProcessResponse/client:User/client:LastName" is not empty.
</summary>
</part>
</selectionFailure>
Here are signOnReturn and XML Payload XSD's
<schema attributeFormDefault="unqualified"
     elementFormDefault="qualified"
     targetNamespace="http://xmlns.oracle.com/Web1"
     xmlns="http://www.w3.org/2001/XMLSchema">
     <element name="Web1ProcessRequest">
          <complexType>
               <sequence>
                    <element name="userName" type="string"/>
<element name="password" type="string"/>
               </sequence>
          </complexType>
     </element>
     <element name="Web1ProcessResponse">
          <complexType>
               <sequence>
                    <element name="result" type="string"/>
               </sequence>
          </complexType>
     </element>
</schema>
<?xml version="1.0" encoding="windows-1252" ?>
<schema attributeFormDefault="unqualified"
     elementFormDefault="qualified"
     targetNamespace="http://xmlns.oracle.com/Web"
     xmlns="http://www.w3.org/2001/XMLSchema">
     <element name="TProcessResponse">
          <complexType>
               <sequence>
                    <element name="result" type="string"/>
<element name="User">
<complexType>
               <sequence>
                    <element name="Id" type="string"/>
<element name="CompanyId" type="string"/>
<element name="SecurityToken" type="string"/>
<element name="FirstName" type="string"/>
<element name="LastName" type="string"/>
</sequence>
</complexType>
</element>
               </sequence>
          </complexType>
     </element>
</schema>

Answer 1

I am sure and can see the data in audit trail.
[2006/12/12 09:17:36]
Updated variable "signOn_Output"
- <signOn_Output>
- <part xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="payload">
- <WebMethodsProcessResponse xmlns="http://xmlns.oracle.com/WebMethods">
<Result xmlns="">
Success
</Result>
- <User xmlns="">
<Id>
2694069
</Id>
<CompanyId>
208133
</CompanyId>
<SecurityToken>
1165936654605
</SecurityToken>
<FirstName>
Jagan
</FirstName>
<LastName>
Rao
</LastName>
</User>
</WebMethodsProcessResponse>
</part>
</signOn_Output>
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[2006/12/12 09:17:36]
Updated variable "tririga"
- <tririga>
- <TririgaProcessResponse xmlns="http://xmlns.oracle.com/WebMethods">
<Result xmlns="">
Success
</Result>
- <User xmlns="">
<Id>
2694069
</Id>
<CompanyId>
208133
</CompanyId>
<SecurityToken>
1165936654605
</SecurityToken>
<FirstName>
Jagan
</FirstName>
<LastName>
Rao
</LastName>
</User>
</TririgaProcessResponse>
</tririga>
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[2006/12/12 09:17:36]
Updated variable "Variable_2"
- <Variable_2>
- <part xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="payload">
- <TririgaProcessResponse xmlns="http://xmlns.oracle.com/WebMethods">
<Result xmlns="">
Success
</Result>
- <User xmlns="">
<Id>
2694069
</Id>
<CompanyId>
208133
</CompanyId>
<SecurityToken>
1165936654605
</SecurityToken>
<FirstName>
Jagan
</FirstName>
<LastName>
Rao
</LastName>
</User>
</TririgaProcessResponse>
</part>
</Variable_2>
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[2006/12/12 09:17:36]
Error in evaluate <from> expression at line "130". The result is empty for the XPath expression : "/client:TririgaProcessResponse/client:User/client:LastName".
oracle.xml.parser.v2.XMLElement@1c8768e
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[2006/12/12 09:17:36]
"{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure" has been thrown.
- <selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/">
- <part name="summary">
<summary>
empty variable/expression result.
xpath variable/expression expression "/client:TririgaProcessResponse/client:User/client:LastName" is empty at line 130, when attempting reading/copying it.
Please make sure the variable/expression result "/client:TririgaProcessResponse/client:User/client:LastName" is not empty.
</summary>
</part>
</selectionFailure>
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