Carlot -

It seems to me that you typed xixtrfun.xll with mixed capitalization.

Instead, if you are referring to XLXtrFun.xll, a web search yields
www.XLXtrFun.com. On that web site, the system requirements do not mention
Windows Vista, so you may want to contact the author regarding
compatibility.

- Mike Middleton
http://www.DecisionToolworks.com
Decision Analysis Add-ins for Excel


"Carlot" wrote in message
...
XIXtrFun.xll fails to load into Excel 2000 running under Vista OS.
it was working just fine with Windows XP.
Some ideas?
--
Carlot