This function attaches to the point using the pointname parameter as the identifier.
            Examples
            In this example, we attach to the previously created point, “ExamplePoint”, within the HDF file, PointFile.hdf, referred to by the handle, fid:
            pointID = EOS_PT_ATTACH(fid, "ExamplePoint")
            The point can then be referenced by subsequent routines using the handle, pointID.
            Syntax
            Result = EOS_PT_ATTACH(fid, pointname)
            Return Value
            Returns the point handle (pointID) if successful and FAIL (–1) otherwise.Typical reasons for failure are an improper point file id or point name.
            Arguments
            fid
            Point file id (long) returned by EOS_PT_OPEN.
            pointname
            Name of point (string) to be attached.
            Keywords
            None
            Version History
            
            See Also
            EOS_PT_DETACH