[rules-users] (no subject)

Hi, I want to convert my file. brl to file. drl. I have this exception. does anyone has an idea (solution) thank you in advance Caused by: com.thoughtworks.xstream.converters.ConversionException: metadataList : metadataList : metadataList : metadataList ---- Debugging information ---- message : metadataList : metadataList cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException cause-message : metadataList : metadataList class : org.drools.brms.client.modeldriven.brl.RuleModel required-type : org.drools.brms.client.modeldriven.brl.RuleModel path : /rule/metadataList ------------------------------- at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:89) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:76) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:60) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:137) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:33) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845) at org.drools.brms.server.util.BRXMLPersistence.unmarshal(BRXMLPersistence.java:91) at fr.dto.RulesEngine.<init>(RulesEngine.java:42) ... 2 more Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: metadataList : metadataList at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:68) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:71)