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  • Custom-pack World Creation/Loading Crashes

    +1 vote

    I've recently tried to fix one of my custom modpacks (magic-based), and have gotten it to get to the main menu. However upon attempting to create a world the game will crash with this error:

    The game crashed whilst ticking memory connection

    Error: java.lang.IllegalArgumentException: Duplicate id value for 27!

    Also here is the console (Fatals, Errors, & Warnings Only)



    Where can I find these id's and how can I fix it?

    -Note I can provide a mod-list if needed

    asked May 30, 2019 in Minecraft Client Mods by Dec (130 points)

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