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<TITLE>Version 6.21 of CLIPS</TITLE>
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<H1><IMG SRC="CLIPSIcon.gif" ALIGN="CENTER" WIDTH="96" HEIGHT="96" NATURALSIZEFLAG=
"3"> Version 6.21 of CLIPS</H1>
<P>CLIPS version 6.21 is currently available in the <A HREF="Download.html">CLIPS Download Area</A>.
It contains the following fixes and enhancements:</P>
<UL>
<LI>The C GetDefglobalValue macro did not have the correct number of arguments.<BR>
<LI>The C RtnArgCount macro did not have the correct number of arguments.<BR>
<LI>Erroneous error generated for object pattern under some circumstances.<BR>
<LI>The C Save macro did not have the correct number of arguments.<BR>
<LI>The C Eval and Build functions did not have the correct number of arguments.<BR>
<LI>The progn$ index variable did not always return the correct value.<BR>
<LI>The member$ function did not always return the correct value.<BR>
<LI>C++ style comments in the code caused errors when using strict ANSI C compilation.<BR>
<LI>The C LoadFactsFromString function did not have the correct number of arguments.<BR>
<LI>Prior bug fix to the PutFactSlot C function prevented memory associated with the fact to
be garbage collected after the fact had been retracted. The original bug is now fixed
through a new API which allows embedded programs to temporarily disable garbage
collection. See section 1.4 of The Advanced Programming Guide for more details.<BR>
<LI>Added information on thread\concurrency and garbage collection issues. See sections 1.3
and 1.4 of The Advanced Programming Guide for more details.<BR>
<LI>Added several new C API calls to the Advanced Programming Guide: DeallocateEnvironmentData
(see section 9.3.4); DecrementGCLocks (see section 1.4); FactDeftemplate (see section 4.4.6);
GetEnvironmentByIndex (see section 9.3.7); and IncrementGCLocks (see section 1.4)<BR>
<LI>An array index error associated with the module menu in the Windows interface was fixed.<BR>
<LI>The status windows in the MacOS X interface were not updating properly.<BR>
<LI>Numerous compilation problems with the XWindows interface source code were fixed.<BR>
</UL>
<P><A HREF="CLIPS.html">Back to CLIPS Home Page.</A></P>
<ADDRESS><IMG SRC="blueline.gif" ALIGN="LEFT" WIDTH="550" HEIGHT="4" NATURALSIZEFLAG=
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Last Update June 22, 2003 <A HREF="mailto:clips@ghg.net">Gary Riley</A></ADDRESS>
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