Are these files in the collects tree or elsewhere? If elsewhere, then drracket should be taking care of this for you (unless you turn off the automatic compilation option). If in the collects tree then you probably want multiple copies of the collecs tree to go along with your multiple binaries (I think). Robby On Saturday, September 17, 2011, Guillaume Marceau <<a href="mailto:gmarceau@gmail.com">gmarceau@gmail.com</a>> wrote: > I test my code against the many different versions of DrRacket, which means I switch version several times a day. > > Each time I launch a different version of DrRacket, I inevitably forget to recompile some library that's in my PLTCOLLECTS, or in my raco link table, which means I get lots of "code compiled for version ~a, not ~a" errors. > > Is there a way to tell Racket to go ahead and recompile these zos as it finds them? > > _________________________________________________ > For list-related administrative tasks: > <a href="http://lists.racket-lang.org/listinfo/users">http://lists.racket-lang.org/listinfo/users</a> >