title: ant exec task when command is fail
body: <p>I have some code:</p>
  
  <pre><code>&lt;exec executable="src/main/webapp/bin/webdriver.bat" failonerror="true" resultproperty="return.code"&gt;
          &lt;arg line="${ccc}/eeee--report-format JSON --report-file  testResultserer/resultere-data/wwwww.json"/&gt;
      &lt;/exec&gt; (1)
  </code></pre>
  
  <p>So, now I would like to exec command , when (1) are going fail. </p>
  
  <p>How can I do this.</p>