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I have installed Netbeans and updated all my plugins. Right after doing that, when I want to start Netbeans, nothing happens. If I start it with the command line, I have Unknown option -L-XX:MaxPermSize=256m shown in the CLI.. Only work-around is to uninstall Netbeans et re-install it. Thing is I cannot update my plugins or make my IDE up to date because I don't which of these updates break the IDE..
Upgrading to Netbeans 8.2 resolves the issue.
The option should be '-J-XX:MaxPermSize=256m' - probably misconfigured in netbeans.conf file (http://wiki.netbeans.org/FaqNetbeansConf).