New answers tagged date-time
2
Are you wrapping the column names in square brackets?
=TEXT([Column2]-[Column1],"h:mm:ss")
Reference: http://msdn.microsoft.com/en-us/library/bb862071(v=office.14).aspx
1
Problem solved: Since I'm working with a dutch setup of SharePoint it never occurred to me to use dutch formulas. When I changed DATEDIFF to the dutch equivalent DATUMVERSCHIL it works like a charm. Very strange though, since some English formulas work, and not this.
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