title: Unable to lock Central Inventory. OPatch will attempt to re-lock
body: <p>Am installing an <code>patch</code> for <code>Fusion Middleware</code> in <code>windows7</code> machine. 
  While applying the <code>patch</code>(command:  opatch apply) getting error as follows:</p>
  
  <pre><code>Unable to lock Central Inventory. OPatch will attempt to re-lock.
  </code></pre>
  
  <p>Kindly help me out.
  Thank you in advance.</p>