FMP 11 - Date calculation just not working
I'm a total 'newbie' trying to work with FMP 11, and my first stab a calculated field has failed and I can't figure out why.
I simply want to calculate the elapsed days between two dates and according to 'The Missing Manual...' the calculated field should be formatted as follows...
End Date - Start Date
However, all I get in the calculated field is '?'.
Can anybody point me in the right direction please?
If I can't get a simple calc. like this to work, what chance have I got with something a bit more challenging!