CodeRunner error Unsupported major.minor version 52.0

General
1

Hi,

I’m trying to run CodeRunner on Mac OSX and I get the following output:

Listening for transport dt_socket at address: 5005

Exception in thread “main” java.lang.UnsupportedClassVersionError: com/backendless/coderunner/CodeRunnerLoader : Unsupported major.minor version 52.0

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

at java.lang.ClassLoader.defineClass(ClassLoader.java:800)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)

at java.net.URLClassLoader.access$100(URLClassLoader.java:71)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

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

at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

at java.lang.ClassLoader.loadClass(ClassLoader.java:425)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

I have checked if my classes in /classes are built with JDK 1.7 and they are. I’ve also tried setting my JAVA_HOME env setting to the Java 1.7 Home folder.

Please advise how to fix this.

Thanks!

2

Hi!
Could you try to build and run project with 1.8 java version?
Regards,
Kate.

3

Hi, thanks for your suggestion. It turned out my JAVA_HOME was set incorrectly, pointing to an old JDK.

I got a bit further now, will post a new Problem with the error.