I have a workbook in which none of the formulas are working. Even
something as simple as "=j67" which should just show the value from J67
does not work.

Other workbooks are all fine, it's just this one that has the problem.
I have even had multiple workbooks opened at once and can switch back
and forth, where it will work in all others, but then it doesn't in
this one.

This workbook does have some code attached to it, but this doesn't seem
to be the problem as I even disable macros when opening it and it still
doesn't work.

When you type the formula (any kind) into a cell and press enter, it
just continues to show the formula as if it were text. I have checked
and checked, there is nothing else in the cell except the formula
starting with "=". I have tried multiple cells on the workbook and
multiple sheets in the workbook, all with the same effect.

Just before I posted this msg, I did try adding a new worksheet to the
workbook and formulas work fine on that new worksheet! What the heck
could be going on with the other worksheets?