I was trying to build my app into a distributable bundle and was getting errors.  So I tried simplifying into something that still gets the errors. When I try to build an app that contains Framework, I get the following error: (Scheme->Create Executable: Distribution / MrEd) "collection-path: collection not found: "main.ss" in any of: (#<path:C:\Documents and Settings\c.bowron\Application Data\PLT Scheme\4.1.2\collects> #<path:C:\Program Files\PLT\collects>)  === context === C:\Program Files\PLT\collects\compiler\embed-unit.ss:804:60 C:\Program Files\PLT\collects\compiler\embed-unit.ss:703:4: do-write-module-bundle" on Windows XP, using Version 4.1.2 This is the program, and it works if I just run it: ------------------------------------ #lang scheme/gui (require framework) (let ((f (new frame:basic% (label "Hello World") (parent #f) (width 320) (height 200))))   (send f show #t)) -- Christopher W. Bowron <<a href="mailto:chris@bowron.us">chris@bowron.us</a>> [ Nothing is exciting if you know what the outcome will be ]    - Joseph Campbell