can you explain that...
When Word saves changes to a file it tends to rename the old file and save a new file, then delete the old file. (Or something like that.)
If the file was selected in Opus and you then saved it in Word, the file would become deselected, because the selected file had really been renamed and deleted. Perfectly logical, but confusing to people who thought "I just saved some changes, so why is the selection lost?"
Now Opus tries to detect that kind of thing happening and pass the selection on to the new copy of the file.
Then, I had understood well… but don't work for me... 
Using Word? Which version?
Or some other program?
i've try with word and excel 2002