[rules-dev] Build Guvnor from Source ( org.apache.maven.reactor.MavenExecutionException: Cannot find parent: org.drools:drools )

Hi , I am trying to build Guvnor from the source but getting below exception , can some one please help. *org.apache.maven.reactor.MavenExecutionException: Cannot find parent: org.drools:drools for project: null:drools-guvnor:war:null for project null:drools-guvnor:war:null* at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:378) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:292) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) 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: org.apache.maven.project.ProjectBuildingException: Cannot find parent: org.drools:drools for project: null:drools-guvnor:war:null for project null:drools-guvnor:war:null at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(DefaultMavenProjectBuilder.java:1370) at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(DefaultMavenProjectBuilder.java:821) at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFileInternal(DefaultMavenProjectBuilder.java:506) at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:198) at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:583) at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:461) at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:365) ... 11 more Caused by: org.apache.maven.project.ProjectBuildingException: POM 'org.drools:drools' not found in repository: Unable to download the artifact from any repository org.drools:drools:pom:5.0.0.SNAPSHOT from the specified remote repositories: central (http://repo1.maven.org/maven2) for project org.drools:drools at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepository(DefaultMavenProjectBuilder.java:603) at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(DefaultMavenProjectBuilder.java:1366) ... 17 more Caused by: org.apache.maven.artifact.resolver.ArtifactNotFoundException: Unable to download the artifact from any repository org.drools:drools:pom:5.0.0.SNAPSHOT from the specified remote repositories: central (http://repo1.maven.org/maven2) at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:212) at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:74) at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepository(DefaultMavenProjectBuilder.java:556) ... 18 more Caused by: org.apache.maven.wagon.ResourceDoesNotExistException: Unable to download the artifact from any repository at org.apache.maven.artifact.manager.DefaultWagonManager.getArtifact(DefaultWagonManager.java:331) at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:200) ... 20 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: < 1 second [INFO] Finished at: Fri Jan 23 15:20:05 EST 2009 [INFO] Final Memory: 1M/2M Regards. Ashish