> wow...that's speed

... this is how [ib-support] works ;-)

> Show function abs
>
> Function abs:
> function library is ib_udf
> Entry point is IB_UDF_abs
> Returns BY VALUE DOUBLE PRECISION
> Argument 1: DOUBLE PRECISION
>
> The server is in linux , and located in /usr/interbase
> and the library is /usr/interbase/lib/ib_udf (odd..does not have
> extension,
> only name)

move the udf-library into the /usr/interbase/bin directory and try it
again it. don't know if all steps are necessary, but this might work

1) drop the declaration of abs:

DROP EXTERNAL FUNCTION abs;

2) Shutdown the Interbase Server

3) move ib_udf into the /usr/interbase/bin directory

4) Start the Interbase Server

5) Redeclare your external function

HTH,
Thomas Steinmaurer
http://www.iblogmanager.com