Hi Robert,

> I have the following in my gdb:
>
> DECLARE EXTERNAL FUNCTION CLEARIBLOG
> VARCHAR(64) CHARACTER SET NONE
> RETURNS CHAR(1) CHARACTER SET NONE FREE_IT
> ENTRY_POINT '_ClearIbLog' MODULE_NAME 'ltudf';
>
>
> When is ltudf.dll loaded, on the first call or when the gdb is opened?

AFAIK, any udf is loaded on the first call (at least on Windows).

Best regards,
Dmitry