Hello again... When I edit a tower or a castle of a world and save it then I normally run my ROM data. But then the edited version of the tower/castle is crashing the game in the loading screen... Can someone help me with my problem? (Sorry if my english was bad)

~JakobTV, Austrian Guy

Hmmm, your description of your problem isn't really good but from what I understood it doesn't seem to make sense. Don't know why your game should crash in the loading screen (we are talking about the same loading screen right? the one at the startup of the game before choosing a save state)
Maybe you could post some screenshots of your level, this might be helpful
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previously (un)known as BooChewbaca

No no no i meant the loading screen when entering a level.

Ahh ok, well than something in your level makes the game crash. post a screenshot and i can try to help
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previously (un)known as BooChewbaca

What are the ID's of the entrance? What are the settings? Yes a screenshot would help
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NSMBUDS - Discord Server 1 - Discord Server 2 - Youtube Channel

Already fixed it! An unused tile was in the level that crashes the game!