Actually, if there's a possibility that there may be a value that is one or more spaces in the field instead of null, you'll do this:
Not IsNull({division}) and Ltrim(Rtrim({division})) <> ""
NOTE: When working with Nulls, you ALWAYS check for Null FIRST!
-Dell
A computer only does what you actually told it to do - not what you thought you told it to do.