NullReferenceException: : SerializedProperty is null

I just import Beginner Code Kit


And add new Enum type in

But it cant work perfectly when my Editor thow error all the time. Help me

 

It's no different than any other nullref. If your code change brought that on, to fix it you have to find out what the null reference is.

If I had to completely wildly speculate, by adding that extra enum entry, perhaps there's another entry of something that must be added as well, and you haven't done that.

But again, same steps apply as any other Nullref:

- Identify what is null
- Identify why it is null
- Fix that.

 

I know and I had checkout all things but seem nothing wrong. The array is locked with 4 element lenth by somehow. U can import the project and try. It dont take the long time.

 

What happens if you right-click the script's hamburger and hit Reset?

 

Wow, genius. Thanks u so much

 

Squinting further at it, if I had to guess what actually happened:

I bet it is because the two class instance level constructors for the Stats arrays are getting overwritten by stored serialized data, bringing them back to size 4, even though you made 'em now 5.

So I'm saying, they are created at

new

time as size 5, then overwritten with size 4 data at the deserialize, then your code runs and boom.

Your hitting Reset nukes the too-small serialized data.