Can't happen happened

[Lacerda, Wellington (AFIS)]

I got this error message (TOMCAT 3.2b6 NT4 ):

java.lang.IllegalStateException: Can't happen - classname is null, who added
this ?
        at
org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:261)
        at
org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
        at org.apache.tomcat.core.Handler.service(Handler.java:243)
        at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:371)
        at
org.apache.tomcat.core.ContextManager.handleStatus(ContextManager.java:1032)
        at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:76
4)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:732)
        at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java:210)
        at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:407)
        at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)

Appart from the funny message, I got a LOT of problems with a web app that
uses a lot of pre-generated classes (are working fine in TOMCAT 3.1). For
instance, null pointers everywhere and some isOutdated() routine breaking in
Jasper ?

Any clues ?

Wellington Silva
UN/FAO