WORKDAY FORMULA
 

hello,
I have a formula that uses the Workday in it,
of course, I have installed the Analyt Toolpack.

but every now and than excel cant load it, and my formula results #none.
I would like to know the reason why it randomly is not able to load the
toolpack.
making the user to manually set up the path to it.

i thank in advance for the reply