Event Glitching?

[WinterKirby]

Map glitching?

Door events, specifically. On random door events, when I enter into the building, I get the following error:

Exception: NoMethodError
Message: undefined method `*' for nil:NilClass
Game_Character_1:198:in `screen_z'
Sprite_Character:148:in `update_or'
PerspectiveTilemap:430:in `shadow_update'
Shadow:179:in `update'
Sprite_Character:37:in `perspectivetilemap_initialize'
PerspectiveTilemap:424:in `shadow_initialize'
Shadow:152:in `initialize'
Spriteset_Map:162:in `new'
Spriteset_Map:162:in `_animationSprite_initialize'
Spriteset_Map:161:in `each'

I don't know why it's happening; these events are practically identical to all the other door events, save graphic and target.

So far, this happens for two buildings, one of which previously worked until I randomly got the glitch for no specific reason.

Somebody halllp.

EDIT: It's not the event; it's actually the map it transfers to. One is a Pokémon center, which is actually just a Pokécenter copy/pasta'd from a previous city. The copy Pokécenter doesn't work. The second is a Trainer dojo, where you can battle trainers and get items. It worked, and then suddenly didn't.

 

[IceGod64]

It is possible you're using a global variable that's not alright to use.

One thing I've done in the past is tried using Global Variables 7 and 8. After I did that, I could never properly reenter the map until I made a new save and used different variables. It seems it's caused by the particle engine or something somehow, I'm not really sure how.

Either way, try a new save first.

 

[WinterKirby]

I don't see how there could be a bad variable.

I already made a new save and now both of my already made PokéCenters are bad.