'''''Non possum vivi''''' (Latin for "(I ) can't live") or '''Wrong ball''' is a softlock where the player is unable to make progress due to having the wrong ball material with no way to [[transformer|change the ball]]. ''Non possum vivi'' can only be resolved by restarting the level; [[suicide]] cannot be solve the problem, since dying does not change the ball. ''Non possum vivi'' is a serious flaw in the design of [[mapping]](even worse than ''Non possum mori''), but can generally be easily avoided by the map maker's careful inspection of the map logic.