title: Error: Could not find the main class
body: <p>I'm using Talend to perform some ETL and I'm getting the following error when I try to run it.</p>
  
  <pre><code>Starting job bmcu_att_insert at 17:11 26/03/2012.
  
  Exception in thread "main" java.lang.NoClassDefFoundError: bmcu_att_summ/bmcu_att_insert_0_1/bmcu_att_insert
  Caused by: java.lang.ClassNotFoundException: bmcu_att_summ.bmcu_att_insert_0_1.bmcu_att_insert
  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  Could not find the main class: bmcu_att_summ.bmcu_att_insert_0_1.bmcu_att_insert.  Program will exit.
  Job bmcu_att_insert ended at 17:11 26/03/2012. [exit code=1]
  </code></pre>
  
  <p>Here is a screen shot of what I'm trying to run as well:</p>
  
  <p><img src="https://i.stack.imgur.com/KReSQ.png" alt="enter image description here"></p>