Different version of scala lib in build path and scala-ide

Question

I have two versions of scala (2.11.4 and 2.10.4). Currently I work on project based on scala 2.10. I've changed version in project properties but ide still complains about it:

The version of scala library found in the build path (2.10.4.) is different from the one provided by scala IDE (2.11.4.). Make sure you know what you are doing.

I am using

Scala IDE build of Eclipse SDK Build id: 4.0.0-vfinal-20141216-1226-Typesafe

Project config:

Any idea how fix that?

Answer 1

That complaint is a warning, not an error; all is fine. I suspect the message is mostly left over from when scala-ide used to only support working with a single version of scala in a single install (which was only fixed in 4.0)

Answer 2

Yes, you can use the multiple scala version support, as described in this blog post.

Once correctly configured, as you showed in the image, this is just a warning and therefore safe to ignore.