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<p>In previous Berkeley DB releases, the DB_ENV->set_paniccall and
DB->set_paniccall methods were used to register a callback
function, called if the database environment failed. In the 4.5
release, this functionality has been replaced by a general-purpose event
notification callback function, set with the
<a href="../api_reference/C/envevent_notify.html" class="olink">DB_ENV->set_event_notify()</a> method. Applications should be updated to
replace DB_ENV->set_paniccall and DB->set_paniccall calls with
a call to <a href="../api_reference/C/envevent_notify.html" class="olink">DB_ENV->set_event_notify()</a>. This also requires the
callback function itself change, as the callback signatures are
different.</p>
<p>The DB_ENV->set_paniccall and DB->set_paniccall calls are
expected to be removed in a future release of Berkeley DB.</p>
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