Tekkit - 6 more error

[Zigiy]

Hello forum!

Another kid with a problem with Tekkit.

I am getting the error "...6 more"

The full error is here:

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0

	at java.lang.ClassLoader.defineClass1(Native Method)

	at java.lang.ClassLoader.defineClassCond(Unknown Source)

	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$000(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 sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

	at java.lang.ClassLoader.loadClass(Unknown Source)

	at net.minecraft.server.ModLoader.addMod(ModLoader.java:172)

	... 6 more

ANYWAY. I have done as you have suggested in previous threads about this error, and that is to download Java JRE7. It was very hard to find, but I finally found a copy of it. Anyway I then tried again. No success. I also tried doing what "Viderizer" did with the Step-by-Step installation instructions and it was no help at all.

Please help, I have un-installed, re-installed both Java 6 & 7 (BOTH 64 bit Versions) and even tried running it without java 6 installed (Didnt work well trust me).

Getting quite desperate! Whenever I watch a YouTube tutorial they all do the same thing as me, but they never get this error. Please help really frustrating!

[Zigiy]

Oh and I'm using Windows 7 Home premium, 64bit version.

I can give you my processor models & such if you wish. But I doubt thats whats causing the problem.

[Torezu]

Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/server/mod_IC2AdvancedMachines : Unsupported major.minor version 51.0

Please help, I have un-installed, re-installed both Java 6 & 7 (BOTH 64 bit Versions) and even tried running it without java 6 installed (Didnt work well trust me).

Specifically how did running it without Java 6 installed not work well? This error is always fixed by installing and using Java 7. I have the feeling you have something configured wrong.

[Ioakim]

try this, delete technic launcher and technic launcher folder in your roaming folders, then go to your control panel and uninstall everything that's there for java, delete your server files for tekkit and restart your computer. Then go here http://www.oracle.com/technetwork/java/javase/downloads/jre-7u4-download-1591157.html download the latest version of java for your computer look at the list carefully and make sure you select the right one,install it, download tekkit server files and run server, re download launcher and install it.

[Jay?]

try the report format.

[Zigiy]

I did what Ioakim said, and uninstalled everything. Restart & Then re-install everything. No success. Still get the same error. The problem is the

mod_IC2AdvancedMachines: Unsupported major.minor 51.0

And whats the report format?

[freakachu]

And whats the report format?

the thing in the sticky labeled "required reading". the one you should have read already.

this error is 100% always due to not being run with java 7. the 1 and only solution is using java 7 because that is the only cause of the issue. if you installed 7 and then still got the error, you were not running the server with the right version of java.

also, moving to the bug board, where this belongs.