#2 The chosen operation is not currently available.

Hello,

I was running Visual JPF under Eclipse 3.4 (Ganymede) for some time quite successfully. Suddenly, when running an existing properties file (with just default properties created by using the "Run Verify" command from a submenu) I get "The chosen operation is not currently available".

The error log shows "Plug-in com.javapathfinder.vjp was unable to load class om.javapathfinder.vjp.delegates.VJPButtonActionDelegate.", with an error trace:

java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:165)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:554)

etc...

Now this error normally happens with classes incompatible with the existing JVM, though I hadn't changed the JVM being used (MacOS X default 1.5). I've since tried it with 1.42 and 1.6 as well, to no avail.

Might you have any idea what would cause this?

Many thanks,
Anthony

[Anonymous]