Definitely something with my installation. Even a trivial build-file leads to this error: <project name="test" default="init" basedir="."> <target name="init"> </target> </project> The error occured after I installed eclipse and tried to create a eclipse project from a sbt project. For this a had to install maven, and then I followed basically these steps: http://biomunky.wordpress.com/2011/02/03/import-sbt-project-into-eclipse/ I think the maven installation killed something ... but even uninstalling maven and reinstalling ant completely didn't help. I don't know if it is really a ant-bug, but it is at least a very missleading error message. Thanks, daniel
I don't have any idea how to help you. Can you provide some sort of stacktrace?
This issue was fixed in Fedora - see https://bugzilla.redhat.com/show_bug.cgi?id=838711
OK, thanks.