Are there any errors in addition to the NPE?<div><br></div><div>The context of the stack-trace suggests the process definition being loaded is not on your classpath.<br><br><div class="gmail_quote">2010/10/21 ÕÔ٩٩ <span dir="ltr">&lt;<a href="mailto:kevin223@gmail.com">kevin223@gmail.com</a>&gt;</span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks Bruno,<div><br></div><div>I have now fixed the&nbsp;NoClassDefFoundError, any ideas about the NullPointer one?</div>
<div><br></div><div>Best Regards,</div><div>Kevin Zhao<br><br><div class="gmail_quote">2010/10/20 Bruno Freudensprung <span dir="ltr">&lt;<a href="mailto:bruno.freudensprung@temis.com" target="_blank">bruno.freudensprung@temis.com</a>&gt;</span><br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


  

<div bgcolor="#ffffff" text="#000000">
<br>
Hello,<br>
<br>
I think you have to add the xstream jar to your classpath.<br>
Here is the Maven dependency :<br>
<br>
<pre>    &lt;dependency&gt;
      &lt;groupId&gt;com.thoughtworks.xstream&lt;/groupId&gt;
      &lt;artifactId&gt;xstream&lt;/artifactId&gt;
      &lt;version&gt;1.3.1&lt;/version&gt;
    &lt;/dependency&gt;
</pre>
Best regards,<br>
<br>
Bruno.<br>
<br>
<br>
ÕÔ٩٩ a ¨¦crit&nbsp;:
<blockquote type="cite"><div><div></div><div>Hello,
  <div><br>
  </div>
  <div>I checked out the latest source from svn repository. It compiled
OK and imported the example projects to my eclipse workspace but the
examples run with error.</div>
  <div>The two example projects are namely&nbsp;drools-examples-drl
&amp;&nbsp;drools-examples-fusion.</div>
  <div><br>
  </div>
  <div>org.drools.examples.pacman.Main gives the errors:</div>
  <div><br>
  </div>
  <div>
  <div>Exception in thread &quot;main&quot; java.lang.NoClassDefFoundError:
com/thoughtworks/xstream/XStream</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.audit.KnowledgeRuntimeLoggerProviderImpl.newThreadedFileLogger(KnowledgeRuntimeLoggerProviderImpl.java:34)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.logger.KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(KnowledgeRuntimeLoggerFactory.java:69)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.pacman.Main.initKsession(Main.java:88)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.pacman.Main.main(Main.java:39)</div>
  <div>Caused by: java.lang.ClassNotFoundException:
com.thoughtworks.xstream.XStream</div>
  <div><span style="white-space:pre-wrap"> </span>at
java.net.URLClassLoader$1.run(Unknown Source)</div>
  <div><span style="white-space:pre-wrap"> </span>at
java.security.AccessController.doPrivileged(Native Method)</div>
  <div><span style="white-space:pre-wrap"> </span>at
java.net.URLClassLoader.findClass(Unknown Source)</div>
  <div><span style="white-space:pre-wrap"> </span>at
java.lang.ClassLoader.loadClass(Unknown Source)</div>
  <div><span style="white-space:pre-wrap"> </span>at
sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)</div>
  <div><span style="white-space:pre-wrap"> </span>at
java.lang.ClassLoader.loadClass(Unknown Source)</div>
  <div><span style="white-space:pre-wrap"> </span>...
4 more</div>
  </div>
  <div><br>
  </div>
  <div><br>
  </div>
  <div>org.drools.examples.broker.Main gives the errors:</div>
  <div><br>
  </div>
  <div>
  <div>java.lang.NullPointerException</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:432)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:468)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.broker.Broker.loadRuleBase(Broker.java:95)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.broker.Broker.createSession(Broker.java:80)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.broker.Broker.&lt;init&gt;(Broker.java:57)</div>
  <div><span style="white-space:pre-wrap"> </span>at
org.drools.examples.broker.Main.main(Main.java:53)</div>
  </div>
  <div><br>
  </div>
  <div>Does anyone experience the similar issues and know how to fix
that?</div>
  <div><br>
  </div>
  <div>Best Regards,</div>
  <div>Kevin</div>
  </div></div><pre><hr size="4" width="90%">
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</blockquote>
<br>
</div>

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