title: Error message even though program is running
body: <p>I have exported a runnable executable jar file from Eclipse, and I am able to run it and everything seems to work, but when I close down the program I get an error telling me the jar file cant be executed.</p>
  
  <p>Can anyone tell me why this is? It's not so much of a problem, I am just curious to why it can tell me it can't be ran, when I just used the program..</p>
  
  <p>Thanks a lot!</p>