Need help how to fix error

[Venomous_Zero86]

hello am making a game and i want to know how can i fix this error ---------------------------
Pokemon Chosen Ones
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Exception: NoMethodError

Message: undefined method `name' for nil:NilClass

PField_Field:1630

PField_Field:1623:in `call'

Event:54:in `trigger'

Event:49:in `each'

Event:49:in `trigger'

PField_MapFactory:198:in `setMapChanging'

PField_MapFactory:175:in `setup'

PScreen_Load:546:in `pbStartLoadScreen'

PScreen_Load:516:in `open'

PScreen_Load:516:in `pbStartLoadScreen'



This exception was logged in

C:\Users\Mike\Saved Games/Pokemon Chosen Ones/errorlog.txt.

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---------------------------
OK
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[Luxray Master]

I had this happen too, if you have created your own type, make sure it is correctly formatted, and if this is occurring from a move that you made (mine was) make sure that the move formatting is correct, if you have not made anything new, just take a version that you have not altered yet, most likely the .zip, and copy the moves and type html.txts.