> Thank you, the problem is that I cannot use UDF functions if they are
> not in the standard UDF libraries (IB_UDF and FBUDF).
> I have seen that F_BLOBMID belongs to the EX_FUNCS library, not
> included in the standard Firebird release, so I cannot use it for
> several reasons.
>
> I am looking for an alternative, without to install new libraries.
>
> Thanks again for your time.
>

its in the standard
FreeUDFLib
Libary
Alan