Hello,
I now use M4 instead of M3 for guvnor.
When I build the package, here is the error !
Any help appreciate.
Nicolas

13:59:58,882 INFO  [STDOUT] Checking access for : demodrools                                                                                          
14:00:34,875 INFO  [STDOUT] DEBUG 16-12 14:00:34,874 (ServiceImplementation.java:listAssets:881)         time for asset list load: 181                
14:00:37,703 INFO  [STDOUT] DEBUG 16-12 14:00:37,702 (ServiceImplementation.java:listAssets:881)         time for asset list load: 30                 
14:00:40,365 INFO  [STDOUT] DEBUG 16-12 14:00:40,364 (ContentManager.java:<init>:45)     Loading content properties                                   
14:00:53,389 INFO  [STDOUT] INFO  16-12 14:00:53,369 (ServiceImplementation.java:checkinVersion:586)     USER:nheron CHECKING IN asset: [cgi] UUID: [40e2abec-104b-4204-a3a5-fe43f2e8b306]  ARCHIVED [false]                                                                                                 
14:01:01,828 INFO  [STDOUT] ERROR 16-12 14:01:01,828 (RepositoryServiceServlet.java:doUnexpectedFailure:74)      org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration:clips:org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration'                                                                                                                                                  
14:01:01,829 ERROR [[/drools-guvnor]] Exception while dispatching incoming RPC call                                                                   
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract org.drools.guvnor.client.rpc.BuilderResult[] org.drools.guvnor.client.rpc.RepositoryService.buildPackage(java.lang.String,java.lang.String,boolean) throws com.google.gwt.user.client.rpc.SerializableException' threw an unexpected exception: org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration:clips:org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration'                                                                                      
        at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360)                                                                  
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546)                                                                   
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)                                             
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)                                                   
        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:53)                                              
        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:127)                                                              
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)                                                              
        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:262)                                                                
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)                                                                 
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)                                           
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)                                                                    
        at java.lang.Thread.run(Thread.java:595)                                                                                                      
Caused by: org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration:clips:org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration'                                                                                                 
        at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:255)                                           
        at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:240)                         
        at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:171)                                                 
        at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:132)                                               
        at org.drools.guvnor.server.builder.BRMSPackageBuilder.getInstance(BRMSPackageBuilder.java:79)                                                
        at org.drools.guvnor.server.builder.ContentPackageAssembler.createBuilder(ContentPackageAssembler.java:133)                                   
        at org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:100)                                          
        at org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:116)
        at org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1370)
        at org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1354)
        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:585)
        at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
        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:28)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.security.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:157)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
        at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
        at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
        at org.drools.guvnor.server.ServiceImplementation_$$_javassist_8.buildPackage(ServiceImplementation_$$_javassist_8.java)
        at org.drools.guvnor.server.RepositoryServiceServlet.buildPackage(RepositoryServiceServlet.java:186)
        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:585)
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
        ... 27 more
Caused by: java.lang.ClassCastException: org.drools.rule.builder.dialect.clips.ClipsDialectConfiguration
        at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:250)
        ... 61 more