have you tried project => clean in eclipse? also, when i was trying to convert a seam-gen proj to an eclipse ear i had both projects open and autobuilding, so the ant deploy from seamgen and hot deploy from eclipse were installing compopnents of the same name and giving this error (doh) maybe something to check if all else fails, maybe try cleaning the relevant work/ and tmp/ entries as well as deploy/ stuff. /matt View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4082715#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...