Hi Gavin,<br><br>I&#39;ve grabbed the latest master, and when I my test app, I get:<br><br>(&quot;&#39;CallbackManager&#39; object has no attribute &#39;sanitize&#39;&quot;,)<br><br>Grepping through the code, I don&#39;t see an implementation for Sanitize anywhere. Callstack looks like this:<br>
<br>_on_rpc_complete [blocking_connection.py:230]    <br>process [callback.py:161]    <br>_on_data_available [connection.py:701]    <br>_handle_read [base_connection.py:315]    <br>process_data_events [blocking_connection.py:95]    <br>
send_method [blocking_connection.py:254]    <br>open [channel.py:236]    <br>__init__ [blocking_connection.py:274]    <br>channel [blocking_connection.py:129]    <br>connect [throughput_confirms.py:19]    <br>&lt;module&gt; [throughput_confirms.py:108]    <br>
<br><br>    def _on_rpc_complete(self, frame):<br>&gt;&gt;&gt;        key = self.callbacks.sanitize(frame)<br><br>Thanks,<br><br>Matt<br>