<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Oddly, the problem seems to have vanished, after I switched from Swindle to PrettyBig, and back again. Will post something more substantial if it reappears. Thanks, Michael --- On Mon, 12/28/09, Robby Findler <robby@eecs.northwestern.edu> wrote: <blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> From: Robby Findler <robby@eecs.northwestern.edu> Subject: Re: [plt-scheme] Not so hygienic macros? To: "michael rice" <nowgate@yahoo.com> Cc: plt-scheme@list.cs.brown.edu Date: Monday, December 28, 2009, 10:39 AM <div class="plainMail">That doesn't sound like a lack of hygiene. Its hard to tell what is going on without a program, but my guess is that you wrote a program that boils down to this one:   #lang scheme   (set! match 5) and the error message is telling you that you're trying to assign to one of the imports to your library. Note that if you had written this:   #lang scheme   (define match 6)   (set! match 5) the definition of 'match' in the body of the module would have shadowed the import and you'd just get the local version of match only. hth, Robby On Mon, Dec 28, 2009 at 9:28 AM, michael rice <<a ymailto="mailto:nowgate@yahoo.com" href="/mc/compose?to=nowgate@yahoo.com">nowgate@yahoo.com</a>> wrote: > > I have a function named MATCH and I seem to be mixing it up with underlying macro code. At least that's what I think is happening. > > The error message: set!: cannot mutate syntax identifier in: match > > Must I change the name of my function? > > Michael > > > _________________________________________________ >  For list-related administrative tasks: >  <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme" target="_blank">http://list.cs.brown.edu/mailman/listinfo/plt-scheme</a> > </div></blockquote></td></tr></table>