I deleted from both configuration files all lines which contain MaxPermSize.
But this error warning keep arising (when main() is running, and run sbt -version at the terminal).
Any suggestions?
المحلول
The PermGen management has changed in Java 8. IIRC, it's managed directly in the OS memory. Consequently, limitations and customizations used until then are not available anymore. Particularly, MaxPermSize does not have any meaning anymore. I suppose intellij does have this option by default when it runs a sbt application.