	General
FAQs	> Why do I get the error message 'Cannot complete operation due to unexpected error'? > Why is the restore runs option grayed out? > Why do I get the message, "Spreadsheet has been modified" even though I haven't changed anything?
	Version 4.0c
Technotes	> Why does Excel sometimes crash when I quit or close a spreadsheet? > Why does the screen saver sometimes cause problems during simulations?

Support Center > Knowledgebase > Simulation Modeling > Problems Running the Model