title: "Compilation failed but no error lines" on working java program (jGRASP)
body: <p>I'm an amateur programmer. I use jGRASP. </p>
  
  <p>I made a lot of functional, running, zero-error programs and copied them to a new computer. Now, when I try to run them, I get that message: "compilation failed but no error lines."</p>
  
  <p>What's going on here? I'd like any help as soon as possible, I have an assignment due.</p>