title: Error while opening port in Python using TI Chronos
body: <p>I'm trying to get accelerometer data from TI Chronos. I get the following error message when I run the code:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Python32\chronos_accel.py", line 50, in &lt;module&gt;
  
  .
  
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  raise SerialException("could not open port %s: %s" % (self.portstr, ctypes.WinError()))
  serial.serialutil.SerialException: could not open port COM4: [Error 5] Access is denied.
  </code></pre>
  
  <p>Why is access denied? I'm the system administrator. Could it be a problem with the code?</p>