https://community.appian.com/discussions/f/general/24451/append-functionI have two rule input of type Any Type When we append both in a!save() , it throws error &quot;Requires writer object&quot;. when we cal from one interface. We are calling from multiple other interface where it works fine. Anyone faced this issue? a!save(rien-USTelligent Community 12https://community.appian.com/thread/94339?ContentTypeID=1Fri, 29 Apr 2022 13:06:24 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:4dc3c658-e5fc-47c3-88b0-a41bff702ee4Stewart Burchell<p>Can you share the code for your append() and example(s) of the values in your two rule inputs. I just tried this and it seems to work fine for me but there may be something specific about what you&#39;re doing.</p><div style="clear:both;"></div>