The problem I have is that I’m forced to add objects into the landscape in order to Spawn the same object in the scene,
I mean if a run my project but I don’t add the objects physically in the map (landscape) I just can’t spawn the object.
(I attach the usual function to spawn the object)
Any suggestions ?
I hope I am understanding your question correctly… Trying doing the spawn from the LEVEL BLUEPRINT…not the actor/pawn/character BP.
heyho 
tried to put an actor in the place u want to spawn the actor… write down the XYZ coordinates and make a vector
tada, no actor in world
did i get this right? btw - right click the transform to split up into loc, rot and scale , split location again to get XYZ
