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java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft


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I am currently setting up a server, but run into this problem every time I try to interact (place and use, but not destroy) with various blocks added by mods inside the game. These include, but are not limited to: Lucky Blocks, Chest (Battle Towers) and chests added by Iron Chests. The Server crashes instantly and I get following crash report (taken from fml): java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft (Full Log: https://pastebin.com/9FRpSqX9)

There appear to be errors with the following mods, from what I can understand: TooManyItems, ChocolateQuest (Better Dungeons), Metroid3Cubed, MoreSwords, Tree Capitator and Twilight Forest. All are PlayerInteractEvent errors.


Also, Dungeons by BetterDungeons are not generated.

Edited by LetsDia
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1.7.10 is no longer supported on this forum. Update.

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.


1.12 -> 1.13 primer by williewillus.


1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.



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