Hi, I am new to Drools and I am not able to build the documentation from the source code. The versions of the various software I am using are as follows: - Drools: 5.0.1.26597.FINAL. - Maven: 2.1.0 - OS: Mac OS X 10.5.7 (on an Intel-Mac) - Java: 1.5.0_16 The error messages I see when trying to build the documentation are as follows: ---------------------------------------------------------------------------------------------------------------- ~/Developmen.../drools-5.0-src\>mvn -e -Ddocumentation clean package + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] The projects in the reactor contain a cyclic reference: Edge between 'Vertex{label='org.drools:docbook-style-drools'}' and 'Vertex{label='org.drools:docbook-style-drools'}' introduces to cycle in the graph org.drools:docbook-style-drools --> org.drools:docbook-style-drools [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.BuildFailureException: The projects in the reactor contain a cyclic reference: Edge between 'Vertex{label='org.drools:docbook-style-drools'}' and 'Vertex{label='org.drools:docbook-style-drools'}' introduces to cycle in the graph org.drools:docbook-style-drools --> org.drools:docbook-style-drools at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:323) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137) at org.apache.maven.cli.MavenCli.main(MavenCli.java:356) 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.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: hidden.org.codehaus.plexus.util.dag.CycleDetectedException: Edge between 'Vertex{label='org.drools:docbook-style-drools'}' and 'Vertex{label='org.drools:docbook-style-drools'}' introduces to cycle in the graph org.drools:docbook-style-drools --> org.drools:docbook-style-drools at hidden.org.codehaus.plexus.util.dag.DAG.addEdge(DAG.java:127) at hidden.org.codehaus.plexus.util.dag.DAG.addEdge(DAG.java:107) at org.apache.maven.project.ProjectSorter.addEdgeWithParentCheck(ProjectSorter.java:351) at org.apache.maven.project.ProjectSorter.<init>(ProjectSorter.java:161) at org.apache.maven.execution.ReactorManager.<init>(ReactorManager.java:99) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:316) ... 10 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2 seconds [INFO] Finished at: Tue May 19 17:48:42 EDT 2009 [INFO] Final Memory: 9M/247M [INFO] ------------------------------------------------------------------------ ~/Developmen.../drools-5.0-src\> ---------------------------------------------------------------------------------------------------------------- Any pointer is appreciated. Thanks! regards, Daniel