I am using Apache Ant version 1.6.5 compiled on July 5 2006 on Ubuntu 7.04 and I have a same problem: | /home/kruno/seam/jboss-seam/build.xml:167: taskdef class org.apache.tools.ant.taskdefs.optional.ANTLR cannot be found | what wersion of ant should I be using? and I am downloading seam src with command: | cvs -d:pserver:anonymous@anoncvs.forge.jboss.com:/cvsroot/jboss co jboss-seam | Is that ok, I used to do it like that, and it was allways OK. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4096882#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...