"Could not load 'plugins/PluginName.jar' in folder 'plugins'" Error

Discussion in 'Bukkit Help' started by Famous Guy, Nov 23, 2013.

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  1. Offline

    Famous Guy

    I've been tryign to install TabAPI on my server but I keep getting this error, This happens to most plugins I made and some I requested here, Can anyone help me?

    Code:
    17:58:15 [SEVERE] Could not load 'plugins/TabAPI.jar' in folder 'plugins'
    org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: org/mcsg/double0negative/tabapi/TabAPI : Unsupported major.minor version 51.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
        at org.bukkit.craftbukkit.v1_6_R3.CraftServer.loadPlugins(CraftServer.java:241)
        at org.bukkit.craftbukkit.v1_6_R3.CraftServer.reload(CraftServer.java:613)
        at org.bukkit.Bukkit.reload(Bukkit.java:277)
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:23)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:192)
        at org.bukkit.craftbukkit.v1_6_R3.CraftServer.dispatchCommand(CraftServer.java:528)
        at org.bukkit.craftbukkit.v1_6_R3.CraftServer.dispatchServerCommand(CraftServer.java:515)
        at net.minecraft.server.v1_6_R3.DedicatedServer.as(DedicatedServer.java:263)
        at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:228)
        at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
        at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
        at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
    Caused by: java.lang.UnsupportedClassVersionError: org/mcsg/double0negative/tabapi/TabAPI : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
        at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:249)
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
        ... 14 more
    
     
  2. Offline

    L33m4n123

    Read the Stacktrace.
    Google for it and you come up with
    ...
    ...
    et voilá
    that TabAPI was compiled against a different version than the one you use
     
  3. Offline

    Famous Guy

    I updated my bukkit.jar but still getting the error :c
     
  4. Offline

    L33m4n123

    I am talking about JAVA Version not Bukkit.. So if you got Java7 then TabAPI is compiled with Java6 or vice versa
     
  5. Offline

    Famous Guy

    Oh so is there a way to downgrade Java?
     
  6. Offline

    L33m4n123

    Just download and install the Java Version you wish and set your IDE up
     
  7. Offline

    Famous Guy

    Can't find Java 6
     
  8. Offline

    L33m4n123

  9. Offline

    Famous Guy

  10. Offline

    L33m4n123

    Source: http://www.java.com/en/download/faq/java_6.xml
     
  11. Offline

    Famous Guy

  12. Offline

    L33m4n123

    Read whats above that Link. The Source means thats where I have the info from
     
  13. Offline

    Famous Guy

    Ohhh so I can't downgrade my Java?
     
  14. Offline

    L33m4n123

    Read what it says there
     
  15. Offline

    Famous Guy

    I can't use "For Mac OS X 10.6 and below, use the Software Update feature " because I have Mac OS X 10.9
     
  16. Offline

    L33m4n123

    Well. Never used a Mac so looks like you need to google for it
     
    Famous Guy likes this.
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