How should errors be presented when loading a Data Page from its Data Source(s)?

Errors encountered from non-Activity based Data Sources are typically published as either "messages" on the Data Page, as well as in its .pyErrorPage embedded page. Should you use an Activity as your Data Source, emulate this pattern.

Any scenario that is dependent on the successful load of a Data Page should (using the Data Page as the step page) evaluate the pxDataPageHasErrors When rule - which checks both locations for symptoms of errors - in order to determine whether the load was completely successful.

Discussion on this topic was sought from the LSA Data Excellence (Pega 8.4) webinar conducted in July 2020. The webinar and its full set of discussions that arose from it are available at LSA Data Excellence: Webinar, Questions & Answers.