Try setting calculation to manual and see what happens.
Tools | Options | Calculation (tab) | Manual (button)
--
Jim Cone
San Francisco, USA
http://www.realezsites.com/bus/primitivesoftware
Excel add-ins (free and for sale)


"Marybeth"
wrote in message
I have built a very large and complex model for a client, and all was going
well until a few weeks ago when Excel started locking up (not responding)
every few minutes. I get the hourglass icon and no indication of what is
going on. The only trick I've figured out to stop it is to bring up Task
Manager, which tends to cut off the interruption. Unfortunately, however, it
happens again a few minutes or seconds later. I can't figure out what could
be causing this, but it is keeping me from getting my work done. Any ideas?