The file is stored on an NAS that was giving me troubles. I asked people to close all files before I took it off line. Needed to flash the firmware on the NAS and it was fine again.
Not sure if any of this makes any difference, but this is all I did to lead up to this problem.
Now, when users try to open up this file, they get the above error message.
I have tried the Open and repair" option, and the open and extract data - These both failed.
I tried removing temp files on the workstations and this does not help either.
The only common element I can see is, before I shut off the NAS, the two files I am having problems with are ones that a user said he closed, but maybe it was not finished saving before I shut it off... This is a stretch, but it's the only thing I can see that is a common element to the problem.
The file in question is attached.