Patch Grid

When i try to use get-locatoin for a patch in a patchgrid i get this

"Warning: internal function "getPatchLocation" does not correctly set an output value. If this is a plugin function, see the updated documentation on plugins for more details.
(NULL expression)"

Can this be solved easerly? Also is it possible to have get neighbors for patch's?

All im trying to do is to see if theres a object in the patch.