WSO2 Business Process bpel, erro em gui com componente “if”

Atualmente, trabalho em um processo de negócios simples com o wso2 Business Process Server no Eclipse Developer Studio. Eu criei um pequeno processo bpel com uma condição “if”. Eu tenho que trabalhar no servidor sem problemas. Mas, eu tive que fazer minha condição de "se" no código-fonte, não consegui configurar o componente if por gui. Eu sempre recebo o seguinte erro quando clico na guia "Detalhes" do componente "if":

An error has occurred. See error log for more details.
org.eclipse.ui.internal.EditorReference.<init>(Lorg/eclipse/ui/internal/EditorManager;Lorg/eclipse/ui/IEditorInput;Lorg/eclipse/ui/internal/registry/EditorDescriptor;)V

Alguém sabe como evitar esse erro? Seria ótimo configurar a condição “if” por GUI para demonstrações…

Eu estou usando o Developer Studio 3.2.0

Aqui está o meu código-fonte bpel:

<!-- Befunde BPEL Process [Generated by the Eclipse BPEL Designer] -->
<!-- Date: Mon Mar 05 12:13:11 IST 2012 -->
<bpel:process name="Befunde"
         targetNamespace="http://avintis.com/befunde"
         suppressJoinFailure="yes"
         xmlns:tns="http://avintis.com/befunde"
         xmlns:bpel="http://docs.oasis-open.org/wsbpel/2.0/process/executable"
         xmlns:ns1="urn:hl7-org:v2xml" 
         xmlns:hl7="http://wso2.org/hl7" 
         xmlns:ns="http://ws.apache.org/axis2">

    <!-- Import the client WSDL -->
    <bpel:import location="BefundeArtifacts.wsdl" namespace="http://avintis.com/befunde" importType="http://schemas.xmlsoap.org/wsdl/" />

    <!-- ================================================================= -->         
    <!-- PARTNERLINKS                                                      -->
    <!-- List of services participating in this BPEL process               -->
    <!-- ================================================================= -->         
    <bpel:partnerLinks>
        <!-- The 'client' role represents the requester of this service. -->
        <bpel:partnerLink name="client"
                     partnerLinkType="tns:Befunde"
                     myRole="BefundeProvider"
                     />


    </bpel:partnerLinks>

    <!-- ================================================================= -->         
    <!-- VARIABLES                                                         -->
    <!-- List of messages and XML documents used within this BPEL process  -->
    <!-- ================================================================= -->         
    <bpel:variables>
        <!-- Reference to the message passed as input during initiation -->
        <bpel:variable name="input"
                  messageType="tns:BefundeRequestMessage"/>

        <!-- 
          Reference to the message that will be returned to the requester
          -->
        <bpel:variable name="output"
                  messageType="tns:BefundeResponseMessage"/>



    </bpel:variables>

    <!-- ================================================================= -->         
    <!-- ORCHESTRATION LOGIC                                               -->
    <!-- Set of activities coordinating the flow of messages across the    -->
    <!-- services integrated within this business process                  -->
    <!-- ================================================================= -->         
    <bpel:sequence name="main">

        <!-- Receive input from requester. 
             Note: This maps to operation defined in Befunde.wsdl 
             -->
        <bpel:receive name="receiveInput" partnerLink="client"
                 portType="tns:Befunde"
                 operation="process" variable="input"
                 createInstance="yes"/>

        <!-- Generate reply to synchronous request -->
        <bpel:assign validate="no" name="InputToResult">

            <bpel:copy>
                <bpel:from>
                    <bpel:literal>
                        <tns:BefundeResponse xmlns:hl7="http://wso2.org/hl7" xmlns:ns1="urn:hl7-org:v2xml" xmlns:tns="http://avintis.com/befunde" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><tns:result>tns:result</tns:result>

                        </tns:BefundeResponse>
                    </bpel:literal>
                </bpel:from>
                <bpel:to variable="output" part="payload"></bpel:to>
            </bpel:copy>
            <bpel:copy>
                <bpel:from part="payload" variable="input">
                    <bpel:query queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0">
                        <![CDATA[hl7:message/ns1:ORU_R01/ns1:ORU_R01.RESPONSE/ns1:ORU_R01.ORDER_OBSERVATION/ns1:ORU_R01.OBSERVATION/ns1:OBX/ns1:OBX.8]]>
                    </bpel:query>
                </bpel:from>
                <bpel:to part="payload" variable="output">
                    <bpel:query queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0">
                        <![CDATA[tns:result]]>
                    </bpel:query>
                </bpel:to>
            </bpel:copy>

        </bpel:assign>


        <bpel:if name="If_OBX8">
            <bpel:condition>
                <![CDATA[$output.payload/tns:result="HH"]]>
            </bpel:condition>

                <bpel:assign validate="no" name="Panic">
                <bpel:copy>
                    <bpel:from>
                        <bpel:literal xml:space="preserve">Panic</bpel:literal>
                    </bpel:from>
                    <bpel:to part="payload" variable="output">
                        <bpel:query queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0"><![CDATA[tns:result]]></bpel:query>
                    </bpel:to>
                </bpel:copy>
            </bpel:assign>


            <bpel:else>
                <bpel:assign validate="no" name="Normal">
                    <bpel:copy>
                        <bpel:from>
                            <bpel:literal xml:space="preserve">Normal</bpel:literal>
                        </bpel:from>
                        <bpel:to part="payload" variable="output">
                            <bpel:query queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0"><![CDATA[tns:result]]></bpel:query>
                        </bpel:to>
                    </bpel:copy>
                </bpel:assign>
            </bpel:else>
        </bpel:if>
        <bpel:reply name="replyOutput" 
               partnerLink="client"
               portType="tns:Befunde"
               operation="process" 
               variable="output"
               />
    </bpel:sequence>
</bpel:process>

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