I have a workbook that I open in the morning and leave open all day. I
always open the original copy, not a read-only version. However, in the
middle of the day I tried to save the workbook and it asked me if I wanted to
save a copy, as if my version suddenly became read only. Also, I tried to
open the same file on another computer (all our computers are connected to
the same network through a shared drive) and it didn't open as a read-only,
but as the original file. Any idea why this is happening? It is a real
problem because other files are linked to this original file, and I need to
save it constantly so we can update the other pages.

Thanks

Adam Bush