[plt-scheme] Error on DrScheme 301

> Comments in the program seem to indicate that the Simply Scheme 
> teachpack was written by Robby Findler. Daniel Yoo seems only to have 
> authored an amendment.

(Well, I did a little bit more work than that.  *grin* I did make minor 
amendments to the original teachpack.  Later on, though, I revamped the 
whole thing to make it work as a language.)

I agree with Matthias; unless you're using the Simply Scheme textbook, 
then it's probably best to stick with the HTDP beginner languages --- they 
provide a lot of good error reporting and syntactic support.


Best of wishes!