Hello,

I downloaded MagicAssistant to manage my Magic: The Gathering card collection.
http://linux.softpedia.com/get/Utili...nt-41546.shtml

Unpacking the zip file seemed to reveal a ready to run program, so i typed ./magicassistant. I got the following message, but don't know what the problem is and how I might fix it. Any suggestions? (I'm naturally happy to provide any additional information if needed.)

Exception in thread "main" Exception while printStackTrace(): java.lang.NoClassDefFoundError: java/lang/System
at java.lang.VMThrowable.fillInStackTrace(Ljava/lang/Throwable;)Ljava/lang/VMThrowable;(Native Method)
at java.lang.Throwable.fillInStackTrace()Ljava/lang/Throwable;(Throwable.java:498)
at java.lang.Throwable.<init>(Ljava/lang/String;)V(Throwable.java:159)
at java.lang.Error.<init>(Ljava/lang/String;)V(Error.java:81)
at java.lang.LinkageError.<init>(Ljava/lang/String;)V(LinkageError.java:72)
at java.lang.NoClassDefFoundError.<init>(Ljava/lang/String;)V(NoClassDefFoundError.java:74)
at java.lang.Throwable.printStackTrace()V(Throwable.java:352)
Original exception was: java.lang.UnsatisfiedLinkError: getClassLoader
at java.lang.VMThrowable.fillInStackTrace(Ljava/lang/Throwable;)Ljava/lang/VMThrowable;(Native Method)
at java.lang.Throwable.fillInStackTrace()Ljava/lang/Throwable;(Throwable.java:498)
at java.lang.Throwable.<init>(Ljava/lang/String;)V(Throwable.java:159)
at java.lang.Error.<init>(Ljava/lang/String;)V(Error.java:81)
at java.lang.LinkageError.<init>(Ljava/lang/String;)V(LinkageError.java:72)
at java.lang.UnsatisfiedLinkError.<init>(Ljava/lang/String;)V(UnsatisfiedLinkError.java:72)
at gnu.classpath.VMStackWalker.getClassLoader(Ljava/lang/Class;)Ljava/lang/ClassLoader;(Native Method)
at gnu.classpath.VMStackWalker.getCallingClassLoader()Ljava/lang/ClassLoader;(VMStackWalker.java:105)
at java.lang.System.loadLibrary(Ljava/lang/String;)V(System.java:663)
at gnu.java.nio.FileChannelImpl.<clinit>()V(FileChannelImpl.java:87)
at java.io.FileDescriptor.<clinit>()V(FileDescriptor.java:64)
at java.lang.VMSystem.makeStandardInputStream()Ljava/io/InputStream;(VMSystem.java:186)
at java.lang.System.<clinit>()V(System.java:85)
at java.io.File.checkRead()V(File.java:1482)
at java.io.File.isDirectory()Z(File.java:673)
at java.lang.VMClassLoader.getResources(Ljava/lang/String;)Ljava/util/Enumeration;(VMClassLoader.java:190)
at java.lang.VMClassLoader.getResource(Ljava/lang/String;)Ljava/net/URL;(VMClassLoader.java:170)
at java.lang.VMClassLoader.getBootPackages()[Ljava/lang/String;(VMClassLoader.java:252)
at java.lang.VMClassLoader.<clinit>()V(VMClassLoader.java:89)
at java.lang.ClassLoader$StaticData.<clinit>()V(ClassLoader.java:154)
at java.lang.ClassLoader.getSystemClassLoader()Ljava/lang/ClassLoader;(ClassLoader.java:799)

Hmm I once had a similar problem with Java with a java application I wrote myself.

After a long travail, it turned out that I was running the "wrong" java...! It also gave the same types of exceptions you list here.

Anyway, it was on FC6, and it turned out there were TWO

java

executables on the system. One was in /usr/local/bin (if I remember right) and the other was an actual, official SUN Microsystems 1.5.0_09 Java Runtime in my home directory.

The one I had in /usr/local/bin was some opensource implementation I got from somewhere, that turned out to not be compatible with newer .JARs compiled with the 1.5.0_09 Java SDK. The problem was my path - according to the path I was using, the Java runtime that popped up first was the one in /usr/local/bin - while the .JAR I had was a 1.5.0_09 compiled jar.

I. e. I was running the wrong executable.

To solve this I changed into the folder where the .JAR was I wanted to run, and then did

to ENSURE that the "correct" Java runtime executable was used.

Since you seem to be running a bash script to get your application started, open the script and check how the "java" executable is found. Ensure that this is running a correctly installed, current Java VM.

Hi,

based on your reply I managed to solve my problem by merely updating to the newest version of Java. Thanks!

No problem! Glad you got it fixed.