I have a random problem with vlookup that I've not been able to figure out.
Sometimes when I try to lookup a value on a different workbook using vlookup,
the formula disappears when I swich to the other workbook. I'm wondering if
this has something to do with the format that the workbooks are save in. To
work around this problem I end up having to copy the worksheet from the other
workbook and paste it into the workbook I'm doing the vlookup in. This
works, but is rather annoying. What causes this problem, and what's the
solution?