n tries to load in a class through its string name but no definition for the class with the specified name could be found. 
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<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1helpers_1_1_class_not_found_exception.html#30976c302c6689e2ae94c0209d9292e5">ClassNotFoundExcepti