Tia

I have a error but i cannot undrestand what is causing it b whenever i
open put the formula and try it is working fine but whenever i close
and open back an error is displayed in the formula "N/A#" with notice
"file error : data may have been lost" i press ok than
and all the formula's from my workbook are gone and a =#N/A is
diplayed instead of the formula's

I am trying to calculate the annual leave of each employee excluding
the holidays so i use the following formula

B24: From
C24: Till
Main!B$73:B$100 = official holidays for year 2007-2008

=NETWORKDAYS(B24,C24,Main!B$73:B$100)

The question is what am i doing wrong and what can i do to prevent the
loss of my formula's and data