Oracle Message ORA-06563 - top level procedure/function specified, cannot have subparts

ERRORtop level procedure/function specified, cannot have subparts
CAUSEThe name to be resolved was specified with three parts (a.b.c) but the a.b part resolves to a top level procedure or function (which dont have nested procedures). This can also happen with a two-part name, a.b, where a is a synonym for a top level package or procedure.
ACTIONSpecify a procedure/function within a package, or a top level procedure/function.