title: Jenkins does not show changes from last build to latest build
body: <p>I am currently seeing an issue in jenkins that even if there is a change in the build, it always says 'No changes from last build'(which is taken from perforce). And in the console output I see that mail is triggered to concerned people who have modified the file in the latest build.</p>
  
  <p>Any Idea what could be the reason ?</p>
  
  <p>Thanks in adv</p>