<div dir="ltr"><div>Alvin,<br><br></div>That looks like an internal error message from some language feature you're using, unless you're using something like begin-lifted or syntax-local-lift-expression directly. Often the contract system generates names for internal use like "lifted.171", but there shouldn't be duplicate definitions, and if there are, it's likely not your fault. Can you share the code that causes this error message? If so, someone may be able to diagnose the error. Otherwise, with just the error message, we don't have much to go on.<br> <div class="gmail_extra"><br clear="all"><div>Carl Eastlund</div> <br><div class="gmail_quote">On Wed, Sep 4, 2013 at 9:59 PM, Alvin Schatte <span dir="ltr"><<a href="mailto:AlvinSchatte@skytex.net" target="_blank">AlvinSchatte@skytex.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div dir="ltr"> <div dir="ltr"> <div style="font-size:12pt;font-family:'Calibri'"> <div>Hello,</div> <div>I got the following error message after <Ctrl-R> in Dr. Racket. I am not sure what it means:</div> <div> </div> <div>module: duplicate definition for identifier in: lifted.171</div> <div> </div> <div>Could someone explain it to me?</div><span class="HOEnZb"><font color="#888888"> <div style="font-size:12pt;font-family:'Calibri'">Alvin Schatte<br></div></font></span></div></div></div> <br>____________________<br> Racket Users list:<br> <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a><br> <br></blockquote></div><br></div></div>