Got MethodID of RefenceType that is not a member of the ReferenceType

I am trying to debug an Java Web application, and for the first time I used JIVE , but I get all of the time 'Got MethodID of RefenceType that is not a member of the ReferenceType' in popup. Never seen that error in Eclipse (Luna) before. After a while another popup says: "Internal Error - An internal error...(blah, blah) Do you want to exit workbench."

Any idea what might be the cause for this error?