[otrs] TicketObject->ArticleCreate Update from 5 to 6

Hello, We had a standalone application that creates tickets, and add articles to OTRS 5 via the RPC using SOAP Once we upgrade to 6 we receive the following message when we then try to the run the method PHP Fatal error: Uncaught SoapFault exception: [soap:Server] Can't locate object method "ArticleCreate" via package "Kernel::System::Ticket" at /opt/otrs/bin/cgi-bin/rpc.pl line 109. Would it be possible to point me to the direction for the new method to using for adding an article to a ticket, or any examples that you might be able to link to. Many Thanks,