[Closed] Edit_Poly accessing selection when object isn't selected

Hello all

I’m trying to get some work done with Edit_Poly modifier and having an issue with it…
Consider the following code:

(
   fn GetEPoly obj =*
   (
      curObj = obj
      if not (isKindOf obj Edit_Poly or isKindOf obj Editable_Poly) then*
      (
         for _mod in obj.modifiers while curObj == obj do*
         (
            if (isKindOf _mod Edit_Poly)
               then curObj = _mod
               else curObj = obj.baseobject
         )
      )
      curObj
   )
   
   obj1 = convertToPoly (box isselected:on)
   poly = Edit_Poly()
   modPanel.addModToSelection poly ui:on
   setselectionlevel poly #vertex
   poly.select #vertex #{1}
   
   obj2 = convertToPoly (box pos:[0, 50, 0] isselected:on)
   setselectionlevel obj2 #vertex
   obj2.Setselection #vertex #{1}
   
   clearSelection()
   format "obj1 selected vert: %
" ((GetEPoly obj1).GetSelection #vertex)
   format "obj2 selected vert: %
" ((GetEPoly obj2).GetSelection #vertex)
)

Why ((GetEPoly obj1).GetSelection #vertex) return me undefined on obj1 when it work perfectly fine on obj2 ?