Please use Ant 1.7.0 or above. . Please manually copy ${project.dir}/lib/development/ecj.jar to ${ant.home}/lib to install ECJ. Then rerun your task. . Task cannot continue because ECJ is not installed. ECJ was automatically installed. Please rerun your task. . Please set the environment variable ANT_OPTS to the recommended value of "-Xmx1024m -XX:MaxPermSize=512m".