""rodrigueztang"" <rodrigueztang@...> wrote in message
news:a68267+s6db@......

> Hi Everyone
>
> I have a Firebird RC1 and when I'm try connect to Database the system
> raise the following exception :

When you try to connect or when you try to run a SQL statement?

> Unsuccessful Execution Caused By system Error That Does Not Preclude
> Successful Execution Of SubSequent Statements. Conection Lost To
> Database

This is indeed a message that comes from the engine.

> I'm using a self UDF.
> Why ?

If you UDF is bad written, it will break the engine, so simple. But your UDF
cannot be executed if you don't invoke it. Again, do you observe that error
when you connect or after you are connected, when you try to use the UDF?

> What it a thread UDF?

A thread safe UDF is one that can be used safely in a super server
architecture. IB & FB are only superservers in Windows. You shouldn't use
global or static variables in your UDF.

C.
--
Claudio Valderrama C. - http://www.cvalde.com - http://www.firebirdSql.org
Independent developer
Owner of the Interbase® WebRing