please try this out on your stuff. should be backward compatible; we'll release soon. http://antlr.org/download/antlr-master-3.4-beta3-completejar.jar http://antlr.org/download/antlr-master-3.4-beta3-src.jar http://antlr.org/download/antlr-runtime-3.4-beta3-sources.jar http://antlr.org/download/antlr-runtime-3.4-beta3.jar Ter