Multiple scala libraies causing error in intellij?

Question

I am using intellij 14 with scala 2.11.6 installed using home brew and symlink using

ln -s /usr/local/Cellar/scala/2.11.6/libexec/src /usr/local/Cellar/scala/2.1         


        

Answer 1

Having similar symptoms, but on a Ubuntu machine, not using brew:

I am using /usr/share/sbt/bin/sbt-launch.jar as launcher. To fix the mentioned problem, I've had to purge the directories 1) project, 2) target and 3) .idea of the relevant Scala projects, doing sbt refresh in IntelliJ (View - Tool Windows -> sbt, hit the Reimport all sbt projects icon), and rebuild all modules afterwards.

As a last step, when the error occurs further, switch over to Ubuntu shell / terminal, and do a sbt clean compile in the problematic project folder. Fix the compile issues if some are occuring. If this does not help, change scalaVersion in build.sbt e.g. from 2.12.9 to 2.12.8 (the error occurs more often with 2.12.9), remove scalaOrganization definition (but keep organization). Repeat the sbt refresh of IntelliJ. OMG.