It may be possible to change drracket to only set that parameter when it is compiling files, but for now I think you have to disable drracket's auto compilation (in the language dialog's show details section) to develop programs like this. <div> </div><div>Robby On Wednesday, January 16, 2013, Sam Tobin-Hochstadt wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I'm not sure if this is a bug or not, so I'm bringing it up on the list. But when I do the following: #lang racket (require compiler/cm) (manager-compile-notify-handler displayln) (managed-compile-zo "/home/samth/sw/plt/collects/tests/typed-racket/succeed/null-program.rkt") Then the compiler places the compiled files in the `compiled/drracket/` directory, and looks for compiled files there as well. The `displayln` handler shows that basically all of Racket is being recompiled. I found this quite surprising, and worse it means I can't use DrRacket to develop this program. Would there be a way for DrRacket not to change whatever parameter is being changed here in the user program's context? Sam _________________________ Racket Developers list: <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a> </blockquote></div>