The Pyret design team has done perhaps the most in-depth research into error messages of anyone [e.g.: http://cs.brown.edu/~sk/Publications/Papers/Published/mfk

The Pyret design team has done perhaps the most in-depth research into error messages of anyone [e.g.: http://cs.brown.edu/~sk/Publications/Papers/Published/mfk-measur-effect-error-msg-novice-sigcse/ http://cs.brown.edu/~sk/Publications/Papers/Published/mfk-me..., http://cs.brown.edu/~sk/Publications/Papers/Published/mfk-mind-lang-novice-inter-error-msg/ http://cs.brown.edu/~sk/Publications/Papers/Published/mfk-mi...]. We're deeply aware of the effect of error messages. This isn't a problem.