I am using IntelliJ IDEA 13.1.4 and also tried the latest release 14.
Running SBT I get the following error:
Error:Cannot determine Java VM executable in
Same error also occurs when you try to do a refresh in "SBT tasks".
Open
Preferences -> Language & Frameworks -> Scala Compiler Server
Turn on
Run compile server (in external build mode)
Once you done with refreshing the project, turn it off again to enable hotswapping back when you change your code in the editor.