My application is going through tables in one database and inserting
records into another using a simple query like this:

INSERT INTO MEMBERSTATUSHISTORY (IdNo, PersonNo, ChangeDate,
MemberStatusNo)
VALUES (:IdNo, :PersonNo, :ChangeDate, :MemberStatusNo);

This process has finished successfully before, inserting some thousand
records without trouble. Recently, though, it has been failing with
the following mysterious error message:

Unknown ISC error 0

I have undone all of my changes to the application since this error
has surfaced, and even recreated a clean database to perform the
inserts on, yet it still fails. When I run the query using IBOConsole,
though, it succeeds. Could anyone perhaps point me in the right
direction as to what might be causing this error?

I'm using Firebird 2.0.