title: IntelliJ: Command Line is too Long. Shorten command line for... in SBT project
body: <p>When I try to run my app, IntelliJ has just started to tell me </p>
  
  <blockquote>
    <p>"Command Line is too Long. Shorten command line for my_app or also for Application default configuration."</p>
  </blockquote>
  
  <p>the <code>my_app</code> is a blue link which leads to an "Edit Configuration" window, automatically selecting and highlighting a dropdown for class path shortener. I select the suggested options, but no change. </p>
  
  <p>I have no idea what this means - I'm using Scala, so I'm using a simple <code>object MyObj extends App</code> which takes no parameters at all. </p>
  
  <p>I have tried adding <code>&lt;property name="dynamic.classpath" value="true" /&gt;</code> to the workspace.xml as suggested by other similar questions, but to no avail. </p>
  
  <p>I used to be able to run my programs in my project fine before. But what lengthens a command line? What is being put on the command line at all?</p>