> Did I misunderstand something there? I thought that blob filters were
> implicitly invoked when dealing with columns oder PSQL variables of
> different blob subtypes, e.g.
>
> FOR
> SELECT tif_blob
> FROM pic_table
> INTO :jpg_var
> DO...
> in a SP (with a corresponding filter declarde)
> ???

No, this will not invoke blob filter. (unless somebody implemented it
in the latest version and did not tell to others ...)

The only way is using BPB when opening blob from client ...

Ivan
http://www.volny.cz/iprenosil/interbase/