Hello ReggW, R> Arachno Ruby, not quiet ready for primetime and it also uses a hacked R> Ruby interpreter. (not good...) Yes, if you try the very outdated 0.6.5 version but i just published 0.6.14 today. If you want to give it a try please read (and observer for future updates): http://www.ruby-ide.com/forum/forumdisplay.php?f=6 And no, as long as the ruby core team don't came up with a C level API for the debugger, having a patched ruby interpreter is a very good thing. I would say that Arachno is still the only debugger that is able to work reasonable well with Ruby on Rails (which means 50-200 times faster - depending on the relation C<->Ruby - then Eclipse or Komodo). And remember that using a debugger is not only for debugging. It also helps you a lot when you want to discover what is the control flow, what methods get called with what types of parameters, etc. Especially for complex frameworks like Rails it is very very import. -- Best regards, emailto: scholz at scriptolutions dot com Lothar Scholz http://www.ruby-ide.com CTO Scriptolutions Ruby, PHP, Python IDE 's