Output path is shared between the same module error

Question

When I try to compile any class in my project I get the error below:

Error scala: Output path .../eval/target/test-classes is shared between: Module \'eval\' tes         


        

Answer 1

This is really a response to @habitat's comment on @Corey Klein 's answer. If someone with enough reputation wants to edit, please go ahead...

I had the same problem with the setting being reset every time I refreshed the project. My solution (with Gradle, although I'm guessing there is an equivalent Maven plugin) was to add

apply plugin: 'idea'
idea {
    module {
        inheritOutputDirs = true
    }
}