title: How can I solve "Got minus one from a read call" in oracle sql developer?
body: <p>When I run the sql developer and set the all data,click the connect but i get this error:</p>
  <pre><code>Status : Failure -Test failed: IO Error: Got minus one from a read call
  </code></pre>
  <p>I am beginner in Oracle. How can I solve that error?</p>
  <p>I use 64-bit Windows7 and oracle 12c.</p>
  <p><img src="https://i.stack.imgur.com/vKkgr.png" alt="enter image description here" /></p>