I have a very large excel workbook (about 60MB) that I created with some
nested if statements, and sumproduct calculations, about 25 macros including
a macro that does an intense caluculation, and all types of other formulas.
I created this for the planning department of a large organization.

All of a sudden today, it will not calculate anything. When the data is
changed nothing happens. I can't even get it to calculate manually. I have
all the automatic calculations settings correct. Can anyone help?