>> ----- Original Message -----
>> From: "Marc Leclerc" <mlpgr@...>
>> > ISC ERROR MESSAGE:
>> > Unable to complete network request to host "localhost".
>> > Failed to establish a connection.
>> > unknown Win32 error 10091

Marc,
you get this error message when your IB server is not running or your SQL
request caused the IB server to restart.
I had same error with a special stored procedure, I could query it
in ISQL but got PLAN error in IBO components. when I tried to
open this query IB server restartet and connection was lost.

my problem then was, that IBO components didn´t allow to reconnect.
the only way out was killing the isapi thread.

hannes