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NPE while serviceTask call
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<span style="margin-bottom: 10px;">
reply from <a href="http://community.jboss.org/people/clauss">Claus Straube</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/534980#534980">View the full discussion</a>
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<div class="jive-rendered-content"><p>arrrrg - found the mistake (of course one minute after my post). Here is the correct code:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml"><span class="jive-xml-tag"><?xml version="1.0" encoding="UTF-8"?></span>
<span class="jive-xml-tag"><span><bpmn:definitions id="ServiceTaskJava"
    xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>"
    xsi:schemaLocation="</span><a class="jive-link-external-small" href="http://schema.omg.org/spec/BPMN/2.0" target="_blank">http://schema.omg.org/spec/BPMN/2.0</a><span> BPMN20.xsd"
    xmlns:bpmn="</span><a class="jive-link-external-small" href="http://schema.omg.org/spec/BPMN/2.0" target="_blank">http://schema.omg.org/spec/BPMN/2.0</a><span>" typeLanguage="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema" target="_blank">http://www.w3.org/2001/XMLSchema</a><span>"
    expressionLanguage="</span><a class="jive-link-external-small" href="http://www.w3.org/1999/XPath" target="_blank">http://www.w3.org/1999/XPath</a><span>" targetNamespace="</span><a class="jive-link-external-small" href="http://sample.bpmn.camunda.com/" target="_blank">http://sample.bpmn.camunda.com/</a><span>"
    xmlns:jbpm="</span><a class="jive-link-external-small" href="http://jbpm.org/4.0/bpmn2" target="_blank">http://jbpm.org/4.0/bpmn2</a><span>"></span></span>
    <span class="jive-xml-tag"><bpmn:itemDefinition id="i1"></span>
        <span class="jive-xml-tag"><jbpm:arg></span>
            <span class="jive-xml-tag"><jbpm:object expr="#{instanceId}" /></span>
        <span class="jive-xml-tag"></jbpm:arg></span>
    <span class="jive-xml-tag"></bpmn:itemDefinition></span>
    <span class="jive-xml-tag"><bpmn:itemDefinition id="i2"></span>
        <span class="jive-xml-tag"><jbpm:var name="v1" /></span>
    <span class="jive-xml-tag"></bpmn:itemDefinition></span>
    <span class="jive-xml-tag"><bpmn:message id="im" name="input message"
        structureRef="i1"></span><span class="jive-xml-tag"></bpmn:message></span>
    <span class="jive-xml-tag"><bpmn:message id="om" name="output message"
        structureRef="i2"></span>
    <span class="jive-xml-tag"></bpmn:message></span>
    <span class="jive-xml-tag"><bpmn:interface id="if1" name="mocks.Mock01"></span>
        <span class="jive-xml-tag"><bpmn:operation id="o1" name="call"></span>
            <span class="jive-xml-tag"><bpmn:inMessageRef></span>im<span class="jive-xml-tag"></bpmn:inMessageRef></span>
            <span class="jive-xml-tag"><bpmn:outMessageRef></span>om<span class="jive-xml-tag"></bpmn:outMessageRef></span>
        <span class="jive-xml-tag"></bpmn:operation></span>
    <span class="jive-xml-tag"></bpmn:interface></span>
    <span class="jive-xml-comment"><!-- process definition -->
    <span class="jive-xml-tag"><bpmn:process id="foobar" name="async_process"></span>
        <span class="jive-xml-tag"><bpmn:startEvent id="s" /></span>
       
        <span class="jive-xml-tag"><bpmn:sequenceFlow id="f1" name="s_2_r1" sourceRef="s" targetRef="r1" /></span>
        <span class="jive-xml-tag"><bpmn:receiveTask id="r1" name="r1" /></span>
       
        <!-- -->
        <span class="jive-xml-tag"><bpmn:sequenceFlow id="f2" name="r1_2_t1" sourceRef="r1" targetRef="st1" /></span>
        <span class="jive-xml-tag"><bpmn:serviceTask id="st1" name="st1" implementation="Other" operationRef="o1"/></span>
       
        <span class="jive-xml-tag"><bpmn:sequenceFlow id="f3" name="st1_2_r2" sourceRef="st1" targetRef="r2" /></span>
        <!-- -->
       
        <!--
        <span class="jive-xml-tag"><bpmn:sequenceFlow id="fx" name="r1_2_r2" sourceRef="r1" targetRef="r2" /></span>
        --></span>
       
        <span class="jive-xml-tag"><bpmn:receiveTask id="r2" name="r2" /></span>
       
        <span class="jive-xml-tag"><bpmn:sequenceFlow id="f4" name="r2_2_e1" sourceRef="r2" targetRef="e1" /></span>
        <span class="jive-xml-tag"><bpmn:endEvent id="e1" name="e1" /></span>           
    <span class="jive-xml-tag"></bpmn:process></span>
<span class="jive-xml-tag"></bpmn:definitions></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The problem was the in and out message ref.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Best regards - claus</p></div>
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<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/534980#534980">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
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