<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16414" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV>Hi,</DIV>
<DIV>The Macro Stepper stumbles at: (let-struct a () ())</DIV>
<DIV>Results:</DIV>
<DIV> </DIV>
<DIV>The Macro Stepper window shows:</DIV>
<DIV>Internal error computing reductions. Original term:<BR>(let-struct a ()
())<BR>#7(struct:trec #5(struct:mrule ...</DIV>
<DIV> </DIV>
<DIV>A separate error window shows:</DIV>
<DIV>Internal errors in macro stepper:<BR>The macro stepper failed to compute
the reduction sequence for one or more terms.<BR></DIV>
<DIV>This is with DrScheme, version 369.10-svn23apr2007 [3m].<BR>Language:
Textual (MzScheme, includes R5RS) or</DIV>
<DIV>Language: Pretty Big (includes MrEd and Advanced Student).</DIV>
<DIV> </DIV>
<DIV>Jos koot</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></BODY></HTML>