OSX can't launch FTB jar

[sixalpha]

I'm trying to get FTB running on an iMac for my son to play but the jar isn't running. Below is a copy/paste from the console. I have checked the java support site and it says to use Apple's software update to update my java, however there are no software updates available. Java Preferences says I have Java SE 6 and J2SE 5.0. I am running OSX 10.5.8.

Is this something where I need to wait on Apple or can I do something on my end to fix this?

7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179] SystemFlippers: didn't consume all data for long ID 0 (pBase = 0x10012a4b0, p = 0x10012a4b4, pEnd = 0x10012a4b8)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179] SystemFlippers: didn't consume all data for long ID 0 (pBase = 0x10011fe90, p = 0x10011fe94, pEnd = 0x10011fe98)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179] Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.lang.ClassLoader.defineClass1(Native Method)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.lang.ClassLoader.defineClass(ClassLoader.java:676)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.security.AccessController.doPrivileged(Native Method)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.lang.ClassLoader.loadClass(ClassLoader.java:317)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
7/10/13 10:38:10 PM [0x0-0x930930].com.apple.JarLauncher[26179]  at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:375)

 

[TheSandwichMakr]

Try uninstalling J2SE 5.0 my guess is thatit's defaulting to java 5 rather than 6 which is why you're getting UnsupportedClassVersionError since the launcher is written for java 6.

 

[sixalpha]

Try uninstalling J2SE 5.0 my guess is thatit's defaulting to java 5 rather than 6 which is why you're getting UnsupportedClassVersionError since the launcher is written for java 6.

I opened up the Java Preferences again and reordered them so Java 6 was at the top and it works now. Thanks for this!