java.lang.UnsupportedClassVersionError: Bad version number

java.lang.UnsupportedClassVersionError: Bad version number in .class file

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

at java.lang.ClassLoader.defineClass(ClassLoader.java:676)

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:317)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

at java.lang.ClassLoader.loadClass(ClassLoader.java:252)

at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)

at com.install4j.runtime.MacLauncher.main(Unknown Source)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:592)

at apple.launcher.LaunchRunner.run(LaunchRunner.java:116)

at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:51)

at apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.java:52)

I assume you have tried to launch a desktop Marvin application that Marvin 5.5 OS X installer setup and your default Java version is still 1.5.

Can you confirm this? Which operating system you have?

The error message says that your Java version is lower than the required one.

Since Marvin 5.5, all Marvin tool requires Java 1.6 (or higher version), see  the documentation: System requirements.

Please upgrade your default Java version to 1.6.

I am using Mac 10.5.8 and my java version is currently 1.6.0_24 as confirmed by checking terminal, and yes i was reffering to the application on my desktop from the marvin installer.

Attempt launching MarvinSketch through the msketch script from the bin directory of the Marvin Beans package (in a terminal window):

/Applications/ChemAxon/MarvinBeans/bin/msketch

Does it work for you?

If Java 1.6 is your default, the msketch script will prefer this one.

With the Java Preferences application, you can also check which Java versions are available on your machine.

/Applications/Utilities/Java Preferences

That did work!!! 

 

is there any way I can make it so i can just directly open the application?

We are still checking why desktop launcher does not use Java 1.6.

Although Java 1.6 is the default on your machine but it is a 64bit implementation. It seems that current OS X installer only accepts 32bit Java implementations.

Unfortunately, Apple does not provide the 32bit implementation of Java 1.6 for OS X 10.5. Apple has implemented it only for OS X 10.6.

Thus, it is an OS X 1.5 specific issue. Under the recent OS X platform (10.6), Marvin OS X installer can incorporate with the 32bit Java 1.6. So Marvin 5.5 can be installed to this platform without any issue.

We are still checking how to improve our OS X installer to accept also 64bit Java.

Until then, please use the cross platform package of Marvin Beans (marvinbeans-VERSION.zip) on OS X 10.5. It is uses the default Java to launch Marvin applications.
If there is any Java 1.6 on your machine and this is the default one, Marvin applications will work. 

Interesting.  When I tried to launch MarvinSketch 5.5 this way from the terminal window, and I was in my home directory, I got this error message:

Grossman-CP-339-iMac-2:~ Bob$ /Applications/ChemAxon/MarvinBeans\ 5.5.0.1/bin/msketch

usage: dirname path

Exception in thread "main" java.lang.NoClassDefFoundError: chemaxon/marvin/Sketch

Caused by: java.lang.ClassNotFoundException: chemaxon.marvin.Sketch

	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

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

	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

But when I moved to the /Applications/ChemAxon/MarvinBeans\ 5.5.0.1/bin directory, it launched fine.

This discussion is relevant to the current one.  You can use the 64-bit version of the browser iCab 4.8 to run the MarvinSketch 5.5 applet on MacOS 10.5.8.  AFAIK, no other browser for MacOS 10.5 exists in a 64-bit version, and there is no version of Java 1.6 for MacOS 10.5 that is compatible with a 32-bit browser.

It seems that the msketch script does not accept space in the path. When you launch the script, it detects its own location (with the help of dirname command). It is needed to detect the absoulte path of MarvinBeans.jar. Set this path into the classpath of the java statement to launch the sketcher. The path includes space that the script can not handle properly.

We will debug it. Until then, remove space from the MarvinBeans directory name.

Thanks, that worked.

I have found the bug in the script. The mypath variable has not been enclosed by quotation marks.

Wrong:

dir=`/usr/bin/dirname $mypath`;

 Good:

dir=`/usr/bin/dirname "$mypath"`;

Please, update the line #41 in the msketch script like this.

In the next release, scripts will be fixed.