'''''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; a [[suicider]] cannot solve the problem, since dying does not change the ball. ''Non possum vivi'' is usually 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.