Was merrily working on a file, saving it, etc.. Now when
I try to open it, it gets about half way (as indicated
from the blue bar) and just sits there. When I go to the
Windows Task Manager the status is "Not Repsonding".

The file is indeed large (50mb), and has quite a few
calculations involved, but I have larger that I am able to
open... If I could just get it open once, I can shear
some of the data, to avoid this going forward, but I can't
even open it...

HELP?!