Faruk,

> I am using IB5.5 (with 10 simul. User Licenced) on W2K. (#1)
>
> on another W2K, also using another IB5.5 which is shipped vith delphi5 pack. (#2)
>
> My App uses UDF's.
>
> #1 Server often produces EEDFADE error, but #2 doesn't.

$0EEDFADE means a Delphi exception. The fact that you see it reported
usually means an exception has escaped one of your UDFs and made it to
the OS. Watch your try-except block to ensure no exceptions cross the
library boundaries.
HTH
--
____
_/\/ando