<!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 5.50.4134.100" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>I am using DrScheme version 202, and try to use Jacal (version1b2) and SLIB version 2d4) on my Windows 98ME PC.<BR>I have downloaded and installed today DrScheme in the directory c:\program files\PLT as suggested by the installation program<BR>I have DrScheme running, with the language option "Big Scheme"<BR>I have moved the slib directory under the c:\Program files\PLT\collects directory<BR>I did the same for the jacal directory<BR>Then I execute the following comands :<BR> (require (lib "load.ss" "slibinit"))     ; loads "init.ss"<BR> (slib:load "c:\\Program files\\PLT\\collects\\jacal\\math")<BR>and I get the error : <BR> Error: ";required feature not supported: " defmacro<BR>What is wrong?<BR>Thanks in advance for your help</FONT></DIV></BODY></HTML>