hi,<br><br>&nbsp;&nbsp; i'm trying to implement the VISIT methods of XmlDumper class but it gives the errors like,<br><br><pre><tt><tt>no visitor implementation for : class <br>org.drools.lang.descr.PatternDescr : org.drools.lang.descr.PatternDescr@1a758cb<br>no visitor implementation for : class <br>org.drools.lang.descr.PatternDescr : org.drools.lang.descr.PatternDescr@1a758cb<br>java.lang.NullPointerException<br> at org.drools.xml.XmlDumper.appendXmlDump(Unknown Source)<br> at org.drools.xml.XmlDumper.visitPackageDescr(Unknown Source)<br> at org.drools.examples.test2.main(test1.java:69)</tt></tt></pre><br>i cant understand why it is giving like...<br><br><pre><tt><tt><tt><tt>at org.drools.xml.XmlDumper.appendXmlDump(<span style="font-weight: bold;">Unknown Source</span>)<br>at org.drools.xml.XmlDumper.visitPackageDescr(<span style="font-weight: bold;">Unknown Source</span>)</tt></tt></tt></tt></pre> i've the method like this,<br><br>XmlDumper xmldumper = new
 XmlDumper();<br>xmldumper.visitPackageDescr(pdesc);<br><br>where <span style="font-weight: bold;">pdesc </span>is the object of <span style="font-weight: bold;">PackageDescr</span> class.can anybody help me ? i dont know whether i am able to make you understand about my problem or not,if no then plz tell me what information you need.but plz provide me a solution,i need it urgently.<br><br>thanking you,<br><br>Niloy Debnath<br>Student<br><br><p>&#32;


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