title: How do I roll back a file checked in to Clearcase?
body: <p>I have a file in my Clearcase repository.  I checked it out and modified it, and then checked it back in.</p>
  
  <p>I haven't done anything like make a baseline, or rebase, or deliver in my stream/view.</p>
  
  <p>I regret having made the changes to this file--I should have undone the checkout, in retrospect.</p>
  
  <p>How do I roll back the modifications?  (Or undo, or revert, or whatever the correct nomenclature is.)</p>