Hi Frederico,
Thank you very much for your help!
This helped me allready much in understanding, but unfortunatly this did not solve my problem. The nodes get expanded but at the desired level there are still only four occupied nodes.
But i think i now unterstood whats the cause of the problem:
While experimenting i found the node size for the query depth is 102.4. I guess the unit is meters for this value?
And the size of the root node is 3276.8 (meters?).
Since my models are at maximum inside a cube of 10 meters the size of the root node with 3276.8 meters is somehow wide outside the required range.
Is there a way to shrink the tree so its root node fits only existing coordinates, or to shrink the root node to say 10 meters?
Unfortunatly i did not recognise such a function yet...
br Martin