Thanks for the follow-up question and for finding this on the public forum. SAP BW 7.0 is the target database version. We have flexibility on the version of Interactive Reporting, I've most recently tried with IR v18.104.22.168. The error code is also on the SAP Forums as "Unanswered".
My guess is everyone running SAP BW is also a Business Objects customer. Let's be pioneers for the Hyperion customers.