IronRuby does not currently support BEGIN/END. HTree uses BEGIN like this to syntax check if code_to_syntax_check contains valid Ruby code. eval("BEGIN { return true }\n#{code_to_syntax_check}") Is there any difference to just using this? eval("return true\n#{code_to_syntax_check}") I thought we had added BEGIN/END to http://www.ironruby.net/About/Roadmap. I don''t see it though. Will add it. Thanks, Shri -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://rubyforge.org/pipermail/ironruby-core/attachments/20090209/c781961f/attachment.html>