title: How to fix issue when committing a change to CVS
body: <p>I'm trying to commit my changes to CVS repository, but I get the following error:</p>
  
  <pre><code>RCS file: /opt/CZarmen/CVS_REPOSITORY/Z_user/lib/python/StudioCustom.py,v
  retrieving revision 1.38
  retrieving revision 1.39
  Merging differences between 1.38 and 1.39 into StudioCustom.py
  M lib/python/StudioCustom.py
  
  RCS file: /opt/CZarmen/CVS_REPOSITORY/Z_user/menu_scripts/Y/ZExtensions,v
  retrieving revision 1.46
  retrieving revision 1.47
  Merging differences between 1.46 and 1.47 into ZExtensions
  M menu_scripts/Y/ZExtensions
  
  cvs commit: Up-to-date check failed for `lib/python/StudioCustom.py'
  cvs commit: Up-to-date check failed for `menu_scripts/Y/ZExtensions'
  cvs [commit aborted]: correct above errors first!
  </code></pre>
  
  <p>Why does it fail to commit my changes? How do I "correct above errors"? </p>