Tom,

> I now have some evidence of what is causing the problem. A Delphi
> client application used a thread to create a connection to the
> database and run a query. Something caused an access violation in the
> thread at the point when it opened the query. The exception was
> handled and the thread will have terminated but the database is still
> showing a connection in the MON$ATTACHMENTS table and this has
> blocked garbage collection. Nothing was logged to firebird.log.

is the exception handling code rolling back the transaction and closing
the connection?
--
Nando Dessena