[rules-users] Drools Introduction Documentation --

Hi All, I am a newbie and have just started with drools with documentation: http://downloads.jboss.com/drools/docs/5.1.1.34858.FINAL/drools-introduct... 1). I am at section 3.4 and got the attached exception while I run the maven command: mvn -Declipse -Ddocumentation clean install -DlocalEclipseDrop=/folder/jboss-drools/local-Eclipse-drop-mirror 2). I am new in the community so i appreciate if some one guide me how to start other than drools documentation so I can start in a right fashion. -- Regards, Imaad Ghouri