Object at index 0 is null - Solved by Restarting Unity

WordsAndNumbers · July 23, 2022, 5:42pm

I reproducibly had this error pop up when running the game after any slicing. Closing Unity and reopening it fixes the problem every time.

MarcusFromOz · August 3, 2022, 5:54am

Yes a restart of Unity fixed it for me also.

mark_likes_tabletop · September 18, 2022, 8:33pm

Thanks! This also worked for me.

Nachiten · November 14, 2022, 2:43am

Also solved for me, thanks!

heckert · November 3, 2023, 12:19am

I have a newer version of ProBuilder and get dfferent messages, but the issue itself remains…
It seems there ProBuilder doesn’t cleanup correctly and some reference is lingering around…

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.GameObjectInspector.OnDisable () (at /home/bokken/build/output/unity/unity/Editor/Mono/Inspector/GameObjectInspector.cs:348)

ArgumentNullException: Value cannot be null.
Parameter name: componentOrGameObject
UnityEditor.GameObjectInspector.OnEnable () (at /home/bokken/build/output/unity/unity/Editor/Mono/Inspector/GameObjectInspector.cs:212)

(Unity 2022.3.11f1, and ProBuilder 5.1.1)

There’s probably a reason the function is still marked as “experimental”…