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Playing with MultiMC, and a lot of mods installed. This is the error I get when I try to load the game.


Instance folder is:
E:\MultiMC\instances\Science-\minecraft\

Instance started with command:
"C:\Program Files (x86)\Java\jre7\bin\java.exe" -Xms512m -Xmx1024m -jar MultiMCLauncher.jar "chif_ii" "3516363125370008872" "MultiMC: Science?" "854x480" "Mojang"

Loading jars...
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/minecraft.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/lwjgl.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/lwjgl_util.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/jinput.jar
Loading natives...
Can't find main class. Searching...
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at MultiMCLauncher.main(MultiMCLauncher.java:181)
Search failed.
Minecraft exited with code -1.
Minecraft has crashed!


I should note that I'm playing this instance on a different computer than the one it was created on - is that what's going on?

Okay, redownloaded Forge, now I'm getting this instead.


Instance folder is:
E:\MultiMC\instances\Science-\minecraft\

Instance started with command:
"C:\Program Files (x86)\Java\jre7\bin\java.exe" -Xms512m -Xmx1024m -jar MultiMCLauncher.jar "chif_ii" "8377608324484789568" "MultiMC: Science?" "854x480" "Mojang"

Loading jars...
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/minecraft.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/lwjgl.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/lwjgl_util.jar
Loading URL: file:/E:/MultiMC/instances/Science-/minecraft/bin/jinput.jar
Loading natives...

Exception in thread "main" java.lang.NoClassDefFoundError: lg
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
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 MultiMCLauncher.main(MultiMCLauncher.java:157)
Caused by: java.lang.ClassNotFoundException: lg
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)
... 12 more
Minecraft exited with code 1.
Minecraft has crashed!

I need help too! HELP!

I would also need some help on this mater since the problem don,t come from a mod since I've removed all mod reboted the server started from fresh forge multiple time I,m kinda lost need some help