I am trying to build source code using maven, I have got the sourcecode from sourceforge server through SVN checkout. I have resolved many plugin dependancy but now it seems like a problem with the code. Any idea why it is giving me this error. [iNFO] Compiling 22 source files to /home/tayyab/jaspersoft/jasperintelligence/jasperserver-war-jar/target/classes [iNFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [iNFO] ------------------------------------------------------------------------ [iNFO] Compilation failure $HOME/jaspersoft/jasperintelligence/jasperserver-war-jar/src/main/java/com/jaspersoft/jasperserver/war/xmla/XmlaHandlerImpl.java:[144,61] inconvertible types found : java.lang.Object required: mondrian.xmla.DataSourcesConfig.DataSource $HOME/jaspersoft/jasperintelligence/jasperserver-war-jar/src/main/java/com/jaspersoft/jasperserver/war/xmla/XmlaHandlerImpl.java:[146,19] operator == cannot be applied to mondrian.xmla.DataSourcesConfig.DataSource,<nulltype>