> Unable to open database 1.db > now what? any suggestions? There's probably nothing you can do to fix the file.
In the past, you could corrupt a database by vacuuming it in one process and then doing an insert in another process. This has been fixed in V3; I don't know if the bug even existed in V2. Most likely, you (or someone) did something to corrupt the file. See Section 6 of <www.sqlite.org/lockingv3.html>. Regards