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  1. Minecraft Launcher
  2. MCL-412

OS X: Exception in thread "main" java.lang.NoClassDefFoundError: net/minecraft/client/main/Main

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 0.9.1
    • 0.9
    • None
    • None
    • Mac OS X 10.8.4
      Apple Java version 1.6.0_45
    • Community Consensus

    Description

      Upgraded to 0.9 Dev Launcher after using 0.8.whateverTheLastVersionWas. Minecraft does not launch. Edited default profile to force it to use a version of Minecraft that I know had been downloaded by the previous version of Dev Launcher, and that shows a status of "Up to date" in the Version Selection area of the GUI. Still will not launch. Service status shows "Online, no problems" for both Multiplayer and Login. Attempting to run Minecraft results in...

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

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        1. devlauncher0.9noworky.png
          devlauncher0.9noworky.png
          149 kB
        2. error.png
          error.png
          37 kB

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            Unassigned Unassigned
            Dirkus411 Dirk van den Brink, Jr.
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            Dates

              Created:
              Updated:
              Resolved:
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