Diffecult to say without seeing the macro
Check out this sites

Charles Williams
http://www.decisionmodels.com/optspeedd.htm#OpSave

Some tips on overcoming slow response (David McRitchie)
http://www.mvps.org/dmcritchie/excel/slowresp.htm




--
Regards Ron de Bruin
(Win XP Pro SP-1 XL2002 SP-2)
www.rondebruin.nl



"Chris" wrote in message ...
Maybe someone can help...

I have an custom excel 20002 application which contains a
number of macros to automate tasks. When I use the
macros the first time, they will quickly execute their
tasks. When I use the macros a second time, many times
they work much more slowly. In both cases they work
correctly, only more slowly in the second case.

Any thoughts of what I can do?