Symptom
When trying to start the Runtime, it crashes instantly. The error is as follows:
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/indy/engine/EngineStartI (Unsupported major.minor version 50.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:13)
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)
Note: On Windows systems, the command window is immediately closed. Type "cmd" inside a command window, and then type "startengine.bat" to see the error message.
Solution
Define the STAMBIA_JAVA_HOME environment variable, and set its value to the absolute path of a valid Java installation (JRE or JDK version 6, 7, or 8).