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  1. Minecraft: Java Edition
  2. MC-121294

Can't launch minecraft: Exception in thread "main" java.lang.NoClassDefFoundError: net/minecraft/client/main/Main

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    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Duplicate
    • Affects Version/s: Minecraft 17w43a
    • Fix Version/s: None
    • Labels:
      None
    • Confirmation Status:
      Unconfirmed

      Description

      ive tried deleting it. and everything, im using an old launcher as mac is kinda old, but that shouldnt be an issue as i was playing not even 12 hours ago and have used this launcher for about a year now

      Exception in thread "main" java.lang.NoClassDefFoundError: net/minecraft/client/main/Main
      Caused by: java.lang.ClassNotFoundException: net.minecraft.client.main.Main
      at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

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              • Assignee:
                Unassigned
                Reporter:
                RoaarPlaysMC Jamie Adamberry
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                Dates

                • Created:
                  Updated:
                  Resolved: