ClassFormatError when deploying WAR file

Hi

I have got a WAR file I want to deploy. It has been built without any problems, but when I try and startup my servlet container (e.g. tomcat or jboss), which then tries to deploy it, I get this error:

....

java.lang.ClassFormatError: Invalid constant pool index 63 inclass file

....

It does not make any different what my servlet container is, with which JDK I compile the code with, or with which version I set in JAVA_HOME, I consistently get this error. If I remove all the code from the class in question, I get the Invalid constant pool error for a different class instead.

Does anybody have any idea what it means, and how I could fix it?

Thanks

Jonny

[749 byte] By [jcavella] at [2007-11-26 19:13:05]