Re: UnsupportedClassVersionError

Posted by ctrueden on Feb 27, 2009; 5:39pm
URL: http://imagej.273.s1.nabble.com/UnsupportedClassVersionError-tp3693514p3693521.html

Hi Joris,

The UnsupportedClassVersionError means that ImageJ is using an older version
of Java than the one used to compile the
plugin. Can you recompile all of your plugins in Eclipse setting the target
Java version to 1.4? Or if you do not have the original source, you could
try applying Retroweaver to your classes to make them 1.4-compatible:
http://retroweaver.sourceforge.net/

-Curtis

On Fri, Feb 27, 2009 at 11:34 AM, joris meys <[hidden email]> wrote:

> Dear all,
>
> I have a plugin that worked fine until I added another class to the jar
> file. That other class is actually another plugin that has to be bundled
> with mine, but nothing from that class is used in the rest of the code.
> Actually, I didn't change a thing in the code of my plugin.
>
> Yet, this new bundle runs fine within ImageJ in Eclipse, but not anymore
> with the other ImageJ I have on my computer. And when I run it on another
> computer, it throws an UnsupportedClassVersionError.
>
> As I didn't change anything in the original code, I'm a bit puzzled about
> how this came about. Anybody has a clue?
>
> Kind regards
> Joris
>