   %  i.e. different wall types)
                            p1.interacts(p1.interacts==int)   = [];
                            p1.neigh_w([p1.neigh_w.id]==w.id) = [];
                            p1.neigh_wid(p1.neigh_wid==w.id)  = [];
                            
                            % Delete interaction object
                            delete(int);
                            rmv = true;
                        end
                    else
                        % Create new particle-wall inter