uld be at least olm_inbound_group_session_size() bytes.</p></dd></dl><dl><dt class="spec value" id="val-inbound_group_session_last_error"><a href="#val-inbound_group_session_last_error" class="anchor"></a><code><span class="keyword">val</span> inbound_group_session_last_error : <span><a href="../Types/InboundGroupSession/index.html#type-t">Types.InboundGroupSession.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> <span>char Ctypes_static.ptr</span></code></dt><dd><p><code>inbound_group_session_last_err