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Launcher/pack Version: 5.4.9

Operating System: mac OSX 10.4.11

Version of Java: 1.5.0_19

Description of Problem: .jar and .osx launchers do not start

Error Messages: Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file

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

at java.lang.ClassLoader.defineClass(ClassLoader.java:620)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)

at java.net.URLClassLoader.access$100(URLClassLoader.java:56)

at java.net.URLClassLoader$1.run(URLClassLoader.java:195)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)

at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

Link to pastebin of log: Don't know what that means

6 answers to this question

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Posted

Launcher/pack Version: 5.4.9

Operating System: mac OSX 10.4.11

Version of Java: 1.5.0_19

Description of Problem: .jar and .osx launchers do not start

Error Messages: Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file

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

at java.lang.ClassLoader.defineClass(ClassLoader.java:620)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)

at java.net.URLClassLoader.access$100(URLClassLoader.java:56)

at java.net.URLClassLoader$1.run(URLClassLoader.java:195)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)

at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

Link to pastebin of log: Don't know what that means

Your computer is too old to run the technic launcher. The launcher requires at least java 6 to run.

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Posted

I don't know if this helps your case, but for me, running OSX 10.5.8, I had to go to Java Preferences and swap out what version to use for Java Applets from J2SE 5.0 to Java SE 6.

I used this page (http://skyreacher.net/?p=90) to help me change out the version I'm using.

After I did this swap, the .jar worked! Again, I hope this helps, though I'm not sure if OSX 10.4 will have this built in.

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