I have downloaded the Racket v 5.3.5 (June 2013). However when I open it to program (I am a beginner and using BSL to study HtDP). the following message is seen in the operation area in red as pasted below .
Welcome to DrRacket, version 5.3.4 [3m]. Language: Beginning Student [custom]; memory limit: 128 MB. Teachpacks: image.ss and image.rkt. *namespace-require/constant: assignment disallowed;* * cannot change constant* * constant: scene+line* * * The problem the language does not function. When I write even a simple line like (+ 3 2) in the definition area, and click run the following message appears rather than the result: *teachpack: the teachpack 'image.ss' was not found* *> * * * I have tried to download several times but every time the same thing happens. Don't know what to do. Please help. Saad * *
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