java.lang.NoSuchMethodError: scala.Predef$.refArrayOps

Question

I have the following class:

import scala.util.{Success, Failure, Try}


class MyClass {

  def openFile(fileName: String): Try[String]  = {
    Failure( new          


        

Answer 1

In my experience, if you still get errors after matching scalatest version and scala version in build.sbt, you have to think about your actual scala version that is running on your machine. You can check it by $ scala, seeing

Welcome to Scala 2.12.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_121). Type in expressions for evaluation. Or try :help. this type of messages. You need to match this Scala version(eg. 2.12.1 here) and build.sbt's one.