ISC ERROR MESSAGE:
file is not a valid database
ISC ERROR CODE:335544323

error occured on the client side using IBO with connection pool.
(disconnect to pool) the server log had 0 errors in it.

The client app is the middle tier of a IM server and was running for
5 days before this happened.

We rebooted the server and the error went away with 0 corruption in
the DB.

Thanks