MP, Thank you. Unfortunately I don't understand what this means, never used "object’s handle" and no clue what means "establish a bookmark". Maybe later you could drop a sample when you have a chance.
ribarm. Thank you, in this case I have to every time put the new object in the tracking entity list once it is created? I am trying to avoid this. The problem is I have many lisp codes and on the way I am creating multiple items. Now I need to modify all of these codes. And I need to receive a selection set of all objects created while code was running. I would prefer not check each code one by one to see where an item is created and add it to an entity list. If I could put only "Start Tracking" and "End Tracking" and receive a selection set in the end this would make the modification so much easier.