Hi Claudia,

Am Sun, 7 Dec 2014 19:09:46 +0000 schrieb Claudia Faust:

=IF((L5+M5=1),(NETWORKDAYS,A1,C5),(NETWORKDAYS,I5, C5))

you have no brackets round the function NETWORKDAYS.
Try:
=IF(L5+M5=1,NETWORKDAYS(A1,C5),NETWORKDAYS(I5,C5))


Regards
Claus B.
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Vista Ultimate / Windows7
Office 2007 Ultimate / 2010 Professional