title: NestableException cannot be resolved when using apache.commons.configuration
body: <p>Im using the following:</p>
  
  <pre><code>import java.util.Collections;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.configuration.XMLConfiguration;
  </code></pre>
  
  <p>and i get:</p>
  
  <pre><code>The type org.apache.commons.lang.exception.NestableException cannot be resolved. It is indirectly referenced from required .class files
  </code></pre>
  
  <p>Im using eclipse... </p>
  
  <p>how can i resolve this? he offers me to Configure build path but i dont really know how to solve this collision from there.....</p>