title: How to get cleartool diff to return to command line while diff viewer is still open?
body: <p>As described in one of the answers to SO question "<a href="https://stackoverflow.com/questions/375398/any-way-to-use-a-custom-diff-tool-with-cleartool-clearcase">Any way to use a custom diff tool with cleartool/clearcase?</a>" I have installed WinMerge and a single diff opens fine in WinMerge based on a command of the form</p>
  
  <p>cleartool diff -g filename filename@@clearcase-virtual-path-to-version-I-want-to_compare-to</p>
  
  <p>But when I run that command in cygwin, it does not return to the command prompt until I exit WinMerge.</p>
  
  <p>I want to execute a few such commands from a .bat file or shell script (one for each file in the change set of a given ClearCase activity) and have it either open multiple WinMerge instances, or multiple windows in a single WinMerge instance.</p>
  
  <p>I was able to do that once but I've forgotten how. Can someone remind me?</p>
  
  <p>I sense that this is not really a ClearCase question, but perhaps a DOS or shell question about spawning processes from the cygwin command line ...</p>