Did you try to restart eclipse? If none of this works, post an SSCCE so that someone can try to reproduce the problem.
Type: Posts; User: copeg
Did you try to restart eclipse? If none of this works, post an SSCCE so that someone can try to reproduce the problem.
First hit after googling the exception:
https://netbeans.org/bugzilla/show_bug.cgi?id=219305
I gather that if you are using netbeans, my advice would be to close any help pages and restart.