Program to call the Where used list for all objects in a target package?

Hello all,

As the title suggests, i'm trying to develop a program that gets a package name as an input and does a where-used search for every object in that package. Afterwards i want it to display the objects that are not used anywhere. Here is my approach:

Unfortunately this always results in an empty table as output, is my logic incorrect? METHOD get_unused_objects.

    DATA: found_check TYPE STANDARD TABLE OF rsfindlst,
          itab        TYPE TABLE OF string.
    SELECT *
     FROM tadir
     INTO TABLE @DATA(package_tab)
     WHERE devclass = @i_packagename. "To get the objects from the exact package i need

    LOOP AT package_tab ASSIGNING FIELD-SYMBOL(<fs>). "To convert it to strings, otherwise it doesn't          "                                                      work with the FM
      APPEND <fs>-obj_name TO itab.
    ENDLOOP.

    LOOP AT package_tab ASSIGNING FIELD-SYMBOL(<object>).
      CALL FUNCTION 'RS_EU_CROSSREF' 
        EXPORTING
          i_find_obj_cls           = 'CLAS'
          no_dialog                = 'X'
        TABLES
          o_founds                 = found_check
          i_findstrings            = itab
        EXCEPTIONS
          batch                    = 1
          batchjob_error           = 2
          illegal_object           = 3
          not_executed             = 4
          not_found                = 5
          no_cross_for_this_object = 6
          object_not_exist         = 7
          wrong_type               = 8
          OTHERS                   = 9.
      CASE sy-subrc.
        WHEN 1.
          cl_demo_output=>display( 'Some exception' ).
        WHEN 2.
          "Another exception and so on.
      ENDCASE.
      IF found_check IS INITIAL.                "If the FM finds no usage for the object
        APPEND <object> TO unused_objects_tab.  "Append it to a table i'll return later
      ELSE.
        CLEAR found_check. "If the FM finds usage, clear the check and continue.
        CONTINUE.
      ENDIF.
    ENDLOOP.
    r_objects_tab = unused_objects_tab.
  ENDMETHOD.