Hi,

> I think there ae some bugs in some versions of the server
> (including that one) that produce this error for no apparent
> reason. I think (but could be wrong) that most of these problems
> are fixed in 1.0.2 and 1.5.
>
> Meanwhile, usually closing the connection and getting a new one
> works.
>
> These operations usually only succeed if there is exactly one
> connection to the db, in my experience.

There must be some bugs in driver too. I have committed a test case
to CVS (org.firebirdsql.jdbc.TestDDL) that reproduces this issue. For
some reasons I am able to drop tables if connection is in autocommit
mode, but not if connection uses commit explicitly. Since we do not
use any specifics in DPB, I think there is something in driver.

Best regards,
Roman