If you had soffice processes running, the installer would not have allowed you to install 4.1.4 (which is still not the most recent version)
Are you having trouble with just the one file, or does this happen with all OpenOffice files?
If it's just the one file, then I suspect that something in that file has gotten corrupted, in which case you should try to recover a back-up copy of your file as soon as possible.
I recommend downloading and running
Recuva as soon as possible as the more use your system has the greater the chance that any back-up file will become unrecoverable.
If you are having this problem with all OpenOffice files, then you could try resetting your OpenOffice User Profile, as described
here