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Error at custom level (NSMBW)

I'm making a Level for my NSMBW-Hack "Better SMBW" (based on NewerSMBW).
I tested it some times and at the last time, the level did't load on Dolphin and on the Wii I gott some Errors and the Wii crashed.
I used "Reggie Next Ultimate".

What are a possible error?

I hope you can find the error.
Thanks for help! :-}
I didn't know there was another NSMB Wii level editor. Did you make any custom tilesets or music? Also I would love to help!