null terminated string describing the most recent error to happen to a session</p></dd></dl><dl><dt class="spec value" id="val-utility_last_error"><a href="#val-utility_last_error" class="anchor"></a><code><span class="keyword">val</span> utility_last_error : <span><a href="../Types/Utility/index.html#type-t">Types.Utility.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> <span>char Ctypes_static.ptr</span></code></dt><dd><p><code>utility_last_error util</code></p><p>A null terminated string describing 