Hi there, Fedora includes Ant 1.7.1 which accoring to http://ant.apache.org/faq.html#java-version only requires JDK 1.3 ti run. But if I install Sun JDK 1.5 and try to run any buildfile, I get: $ ant -v Apache Ant version 1.7.1 compiled on April 16 2010 Buildfile: build.xml Detected Java version: 1.5 in: /usr/lib/jvm/java-1.5.0-sun-1.5.0.22/jre Detected OS: Linux BUILD FAILED java.lang.UnsupportedClassVersionError: Bad version number in .class file I have many machines some with Fedora 11, 12 and 13, both 32 and 64-bit, but and some show this error, some don't. And I can't find what to change, install or update so that Fedora Ant works with Sun JDK 1.5.0. Curious, if I use gij and gcj (which are java 5) and works fine. []s, Fernando Lozano -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines