title: MT4 cannot open file error 4103 when running an EA in Strategy Tester
body: <p>I wrote an EA using an indicator which reads in a configuration file. This <strong>configuration file</strong> is put in the folder <strong><code>MQL4\Files</code></strong>.</p>
  
  <p>When I run the EA with the live chart, it works well. But when I tried to test this EA using the strategy tester, it returns an <strong><code>4103 error: can not open file.</code></strong></p>
  
  <p>Any idea why this happens?</p>
  
  <p>And how to address this problem?</p>