View Full Version : Help me! I can't run a .jar file!

The Ripper18
October 14th, 2006, 07:43 PM
I play a game called Runescape, and I wanted to try playing on a private server. I found a good program for running private servers called MoparScape. Unfortunately, in the readme it says mac users should run the file "MoparScape.jar", but when I run it I get the following alert: "The jar file "MoparScape.jar" couldn't be launched. Check the Console for possible error messages." Can anybody help me?

Edit: I run OS 10.3.9

October 14th, 2006, 07:50 PM
Looks like you need Xcode to create a .jar app...maybe you need it to open one as well?

October 14th, 2006, 09:09 PM
Did you check the console for error messages, like the error message recommended? What were the error messages?

September 9th, 2008, 10:15 PM
I have the exact same problem. Here's what it says when you open the console:

Jar Launcher[805]: Could not contact MightyMouseHelper.app: Err 6

Exception in thread "main" java.lang.UnsupportedClassVersionError: Bot (Unsupported major.minor version 49.0)

at java.lang.ClassLoader.defineClass0(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:539)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)

at java.net.URLClassLoader.access$100(URLClassLoader.java:55)

at java.net.URLClassLoader$1.run(URLClassLoader.java:194)

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

at java.net.URLClassLoader.findClass(URLClassLoader.java:187)

at java.lang.ClassLoader.loadClass(ClassLoader.java:289)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)

at java.lang.ClassLoader.loadClass(ClassLoader.java:235)

at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)

I hope that makes sense to someone.

September 9th, 2008, 10:38 PM
Can I ask where this .jar file was sourced from? You may need to ask the original .jar file creator about this error .... which website did you download it from?


September 9th, 2008, 10:49 PM
I don't know about him, but I downloaded it from http://www.megaupload.com/de/?d=MW6EBEQ5

October 24th, 2011, 01:51 AM
i got the .jar file when i tried to install the camera setup in for my facebook chat.

when i tried to install it, it gave me the error message like this:

"Check the Console for possible error messages."

How can i rectify this?