Minecraft Forums

Quote from sp614x

Can you post the whole log (Options -> Show Log)?

Same problem here:

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
at java.lang.Class.getMethod0(Class.java:2679)
at java.lang.Class.getMethod(Class.java:1605)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 5 more

The show log button shows me this:


MagicLauncher 1.1.3
java.home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
java.runtime.name: Java(TM) SE Runtime Environment
java.runtime.version: 1.6.0_45-b06-451-11M4406
os.name: Mac OS X
os.version: 10.8.3
os.arch: i386
sun.arch.data.model: 32

Hey I love your launcher but if I may be so bold to suggest, that you use a different download site then adfly? I have twice mistook the download ad for the launcher add. My own fault really, But its just a suggestion.

Quote from citingmarc

Same problem here:

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
at java.lang.Class.getMethod0(Class.java:2679)
at java.lang.Class.getMethod(Class.java:1605)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 5 more

The show log button shows me this:


MagicLauncher 1.1.3
java.home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
java.runtime.name: Java™ SE Runtime Environment
java.runtime.version: 1.6.0_45-b06-451-11M4406
os.name: Mac OS X
os.version: 10.8.3
os.arch: i386
sun.arch.data.model: 32

this is what happens with the show log button for me as well.

Quote from citingmarc

Same problem here:

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
at java.lang.Class.getMethod0(Class.java:2679)
at java.lang.Class.getMethod(Class.java:1605)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 5 more

The show log button shows me this:


MagicLauncher 1.1.3
java.home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
java.runtime.name: Java™ SE Runtime Environment
java.runtime.version: 1.6.0_45-b06-451-11M4406
os.name: Mac OS X
os.version: 10.8.3
os.arch: i386
sun.arch.data.model: 32

Had this same problem, except on Debian x86_64. It appears that the launcher isn't seeing lwjgl.jar properly, perhaps due to mistake in the launcher's writing. Workaround solution: add lwjgl.jar, lwjgl_util.jar, and jinput.jar as mods through the launcher. Problem solved.

Quote from TwitterGirl1234

Whenever I try to log in with 1.1.3, I get this: (I'm using a Mac on 10.6.8)


*** MagicMinecraftLauncher 1.1.3 ***
java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2436)
at java.lang.Class.getMethod0(Class.java:2679)
at java.lang.Class.getMethod(Class.java:1605)
at magic.launcher.Launcher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 5 more

The issue seems to be with the launcher. As a workaround, try adding the following files as mods. They are located in .minecraft/bin/

• lwjgl.jar
• lwjgl_util.jar
• jinput.jar

MagicLauncher is just fantastic. I've been using it for months, it made the mod try-out pretty much simple.

But, my only complaint is that, when I add any mod in "mods" folder, ML automagically adds it in every configuration I've ever created, including those for MC betas, so I'm forced to open every config in the setup and remove the conflicting mod.

Please, I'd be grateful if it were fixed or there were an option to disable it.

Quote from Raithox

Ok so it seems that the newest version doesn't work at all for all macbook users... including me.

Not only in Mac, but Linux as well. I only have Linux machines to test, so could I ask you to try the solution I've found (post above yours), and tell me if it works for Macs as well?

http://pastebin.com/x5GC4X0V

Running on Mac OS X

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at magic.launcher.Launcher.main(Unknown Source)

Can't start at all on a 2013 iMac

I can't get mine to start either!!!!! The developers hate us MACies. If anyone finds a solution please Private Message me.

Quote from DragonBoyDan

This work around works for me.
It's still rather frustrating. But it works so yay.
<edit> Forgot to mention I am running OSX.

What the heck does "This" even mean? Please explain what we need to do.

Quote from Davidjb7

I can't get mine to start either!!!!! The developers hate us MACies. If anyone finds a solution please Private Message me.

What the heck does "This" even mean? Please explain what we need to do.

He's referring to my image:

Quote from Ronjoe

He's referring to my image:

I understand that! But what are you doing in that picture? ANd how can we do it?

Quote from Davidjb7

I understand that! But what are you doing in that picture? ANd how can we do it?

The problem that is occurring is that Magic Launcher isn't loading the lwjgl packages that are required for minecraft to run. This issue only exists in the Mac and Linux versions of the launcher, and seems to be due to a programming error. What I'm doing is forcing these essential files to load.

What I did was add the lwjgl files as mods in the launcher. This mod-adding section can be found by clicking "Setup" in the launcher. Those files come standard with minecraft, and can be found in .minecraft/bin/. You simply add those three files (lwjgl.jar, lwjgl_util.jar, and jinput.jar), and put them at the top of the list (so they load first).

my magic launcher has an error and doesn't let me on

Error:*** MagicMinecraftLauncher 1.0.0 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)

Quote from Ghostmaker94

*** MagicMinecraftLauncher 1.1.3 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
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 java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at magic.launcher.Launcher.main(Unknown Source)

Can't start at all on a 2013 iMac

Quote from connor4191422

my magic launcher has an error and doesn't let me on

Error:*** MagicMinecraftLauncher 1.0.0 ***
java.lang.ClassNotFoundException: net.minecraft.client.Minecraft
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)

It appears that neither of you have installed Minecraft before. You can install it by using Mojang's default launcher (or play it in-browser). You can do this at minecraft.net.

but I installed minecraft ages ago

Quote from connor4191422

but I installed minecraft ages ago

It'd still be a good idea to double check using the default launcher. If Minecraft doesn't run with that launcher, it won't run on this one. Doing this also helps you figure out whether your issue is because of Minecraft or because of Magic Launcher.

Not working for me either on 2011 iMac. I have the same error.