Hurray! it works just fine now . Thanks a lot Neil.<div><br></div><div><br><br><div class="gmail_quote">On Wed, Feb 8, 2012 at 3:16 PM, Neil Van Dyke <span dir="ltr"><<a href="mailto:neil@neilvandyke.org">neil@neilvandyke.org</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Veer Singh wrote at 02/08/2012 04:27 AM:<div class="im"><br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Well actual program is here :<br> <br> <a href="https://github.com/veer-public/Predicate-Dispatch" target="_blank">https://github.com/veer-<u></u>public/Predicate-Dispatch</a><br> <br> Running example1.rkt produces the error in DrRacket , but runs fine in console.<br> </blockquote> <br></div> You can temporarily make this error go away by selecting DrRacket menu item "Language -> Choose Language..." and then selecting "Dynamic Properties -> No debugging or profiling".<br> <br> It will take a PLT person to determine why this error occurs.<span class="HOEnZb"><font color="#888888"><br> <br> -- <br> <a href="http://www.neilvandyke.org/" target="_blank">http://www.neilvandyke.org/</a><br> </font></span></blockquote></div><br></div>