Was your BRL generated from the same version of Guvnor as you are trying to de-serialise?<br><br>The XStream error you show normally happens when there has been a change to the Object model from which the XML was created and the model to which you are trying to hydrate.<br>
<br><div class="gmail_quote">2011/9/15 AZZAZ mohamed <span dir="ltr">&lt;<a href="mailto:azzazm@gmail.com">azzazm@gmail.com</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>Hi,</div><div><br></div><div><span style="color:rgb(51, 51, 51);font-family:arial, sans-serif;font-size:16px;background-color:rgb(245, 245, 245)"><span>I want to</span> <span>convert</span> <span>my file.</span> <span>brl</span> <span>to  file</span><span>.</span> <span>drl.</span> <span>I have this</span> <span>exception.</span> <span>does anyone</span> <span>has an idea</span> <span>(solution)</span><br>

<span>thank you in advance</span></span></div><div><span style="color:rgb(51, 51, 51);font-family:arial, sans-serif;font-size:16px;background-color:rgb(245, 245, 245)"><span><br>
</span></span></div><div>Caused by: com.thoughtworks.xstream.converters.ConversionException: metadataList : metadataList : metadataList : metadataList</div><div>---- Debugging information ----</div><div>message             : metadataList : metadataList</div>

<div>cause-exception     : com.thoughtworks.xstream.mapper.CannotResolveClassException</div><div>cause-message       : metadataList : metadataList</div><div>class               : org.drools.brms.client.modeldriven.brl.RuleModel</div>

<div>required-type       : org.drools.brms.client.modeldriven.brl.RuleModel</div><div>path                : /rule/metadataList</div><div>-------------------------------</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:89)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:63)</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:76)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:60)</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:137)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:33)</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909)</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845)</div><div><span style="white-space:pre-wrap">	</span>at org.drools.brms.server.util.BRXMLPersistence.unmarshal(BRXMLPersistence.java:91)</div>

<div><span style="white-space:pre-wrap">	</span>at fr.dto.RulesEngine.&lt;init&gt;(RulesEngine.java:42)</div><div><span style="white-space:pre-wrap">	</span>... 2 more</div><div>Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: metadataList : metadataList</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:68)</div><div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38)</div>

<div><span style="white-space:pre-wrap">	</span>at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:71)</div>
<br>_______________________________________________<br>
rules-users mailing list<br>
<a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><br>
<br></blockquote></div><br>