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