Following your notes I got through all problems you explained. Last problems seems to be in persistence.xml and compomemt.xml. I finally get my application working by fixing those two files as explained here Running seam-gen project on apache tomcat without embedded JBoss. I also joined src/main and src/hot source folders, because I was not sure if hot deployment supported uder tomcat. Last thing I did was antlr.jar added to WEB-INF/lib to fix class not found exception related to antlr parser.