Must set platform.home Must set platform.bootcp Must set platform.java Must set platform.javac The J2SE Platform is not correctly set up. Your active platform is: ${platform.active}, but the corresponding property "platforms.${platform.active}.home" is not found in the project's properties files. Either open the project in the IDE and setup the Platform with the same name or add it manually. For example like this: ant -Duser.properties.file=<path_to_property_file> jar (where you put the property "platforms.${platform.active}.home" in a .properties file) or ant -Dplatforms.${platform.active}.home=<path_to_JDK_home> jar (where no properties file is used) Must set src.dir Must set test.src.dir Must set build.dir Must set dist.dir Must set build.classes.dir Must set dist.javadoc.dir Must set build.test.classes.dir Must set build.test.results.dir Must set build.classes.excludes Must set dist.jar Must set javac.includes Must select some files in the IDE or set javac.includes To run this application from the command line without Ant, try: ${platform.java} -cp "${run.classpath.with.dist.jar}" ${main.class} To run this application from the command line without Ant, try: ${platform.java} -jar "${dist.jar.resolved}" Must select one file in the IDE or set run.class Must select one file in the IDE or set debug.class Must set fix.includes Must select some files in the IDE or set javac.includes Some tests failed; see details above. Must select some files in the IDE or set test.includes Some tests failed; see details above. Must select one file in the IDE or set test.class Must select one file in the IDE or set applet.url Must select one file in the IDE or set applet.url