Folks, When trying to rebuild the Snapshot Binaries (to resolve a different error) in the BRMS I'm getting the exception below. It's probably because I'm using the latest from Trunk (Snapshot 4.1.0 , as of Wed). I'll try again with the latest stable version. For Info, I'm running Java 1.6.0_3 on JBoss App Server 4.2.1 Paul An error occurred executing the action. Details com.thoughtworks.xstream.mapper.CannotResolveClassException: org.drools.ruleflow.core.impl.RuleFlowProcessImpl : org.drools.ruleflow.core.impl.RuleFlowProcessImpl at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:49) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:76) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.CGLIBMapper.realClass(CGLIBMapper.java:40) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:60) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:76) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26) at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:34) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:113) at com.thoughtworks.xstream.core.ReferenceByIdMarshallingStrategy.unmarshal(ReferenceByIdMarshallingStrategy.java:14) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:846) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:833) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:781) at org.drools.compiler.ProcessBuilder.addProcessFromFile(ProcessBuilder.java:174) at org.drools.compiler.PackageBuilder.addRuleFlow(PackageBuilder.java:220) at org.drools.brms.server.contenthandler.RuleFlowHandler.compile(RuleFlowHandler.java:51) at org.drools.brms.server.builder.ContentPackageAssembler.buildAsset(ContentPackageAssembler.java:139) at org.drools.brms.server.builder.ContentPackageAssembler.buildPackage(ContentPackageAssembler.java:127) at org.drools.brms.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:84) at org.drools.brms.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:92) at org.drools.brms.server.ServiceImplementation.buildPackage(ServiceImplementation.java:849) at org.drools.brms.server.ServiceImplementation.buildPackage(ServiceImplementation.java:839) at org.drools.brms.server.ServiceImplementation.rebuildSnapshots(ServiceImplementation.java:1015) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56) at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.security.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:40) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91) at org.drools.brms.server.ServiceImplementation_$$_javassist_3.rebuildSnapshots(ServiceImplementation_$$_javassist_3.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.seam.remoting.gwt.GWTToSeamAdapter.callWebRemoteMethod(GWTToSeamAdapter.java:74) at org.jboss.seam.remoting.gwt.GWTRemoteServiceServlet.processCall(GWTRemoteServiceServlet.java:290) at org.jboss.seam.remoting.gwt.GWTRemoteServiceServlet.doPost(GWTRemoteServiceServlet.java:172) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.web.ContextFilter$1.process(ContextFilter.java:42) at org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:46) at org.jboss.seam.web.ContextFilter.doFilter(ContextFilter.java:37) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619)