title: svn 1.7 error E200009 Could not add all targets because some targets are already versioned
body: <p>I did a clean checkout of a repository then every day I have an hudson job that runs a script to backup the configuration. Part of the script is to add <code>*.xml</code></p>
  
  <pre><code>$ svn add *.xml
  svn: warning: W150002: '/data/hudson/config.xml' is already under version control
  svn: E200009: Could not add all targets because some targets are already versioned
  svn: E200009: Illegal target for the requested operation
  </code></pre>
  
  <p>The warning is fine because some of the xml files are already under version control but I don't understand why I get the <code>E200009</code> error. If there is nothing to add, there should be no error.</p>