I'm FAR from an expert on any of this but looking at the line at issue: > gij -classpath antlr.Tool -o > ../tools/generated/gnu/classpath/tools/gjdoc/expr/ \ > ../../classpath-0.98/tools/gnu/classpath/tools/gjdoc/expr/java-expression.g > gij: unrecognized option -- `-o' I think I see two spaces after -classpath which makes me think there's a missing argument in there. Also, antlr.Tool looks like a classname not a classpath. So I'm guessing that this should be: gij -classpath "something" antlr.Tool -o ... Then -o is an argument to antlr.Tool, not to gij. Where you go from there, how you get a correct value into the missing classpath parameter, I'm not sure... Stuart. -- http://sab39.netreach.com/