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33 <h3 class="section">10.6 Known CMail Problems</h3>
35 <p>It's possible that a strange conjunction of conditions may occasionally
36 mean that <samp><span class="file">cmail</span></samp> has trouble reactivating an existing
37 XBoard. If this should happen, simply trying it again should work.
38 If not, remove the file that stores the XBoard's PID
39 (<samp><span class="file">game.pid</span></samp>) or use the ‘<samp><span class="samp">-xreuse</span></samp>’ option to force
40 <samp><span class="file">cmail</span></samp> to start a new XBoard.
42 <p>Versions of <samp><span class="file">cmail</span></samp> after 2.16 no longer understand the old file format
43 that XBoard used to use and so cannot be used to correspond with
44 anyone using an older version.
46 <p>Versions of <samp><span class="file">cmail</span></samp> older than 2.11 do not handle multi-game messages,
47 so multi-game correspondence is not possible with opponents using an older