title: Unrecognized VM option 'CMSClassUnloadingEnabledn-J-Xmx2Gn'
body: <p>I have installed scala, sbt on Mac. When I try to run sbt it gives an error  Unrecognized VM option 'CMSClassUnloadingEnabledn-J-Xmx2Gn'. I think there is an issue with JVM but could not find any help for this error.</p>
  
  <p>More error info:
  Did you mean '(+/-)CMSClassUnloadingEnabled'?
  Error: Could not create the Java Virtual Machine.
  Error: A fatal exception has occurred. Program will exit.</p>