Data pages store data that Pega 7 requires to populate work item properties for calculations or other processes. Developers determine where that data comes from and how it gets there by referencing data sources on the data page record.
Error handling in data pages is a complex problem. There are several ways to handle errors, and various ways are relevant at different parts in the process. Pega 7 provides developers with the tools that they need to create custom error-handling responses to specific data page errors without using activities.
Data page errors occur for a variety of reasons, but they all prevent data from being loaded as expected. Examples of causes of data page errors include system errors, invalid input, using keys that are not on a keyed page list, connection problems, and security or authorization issues.
There are two types of data page errors: invocation errors and data source errors. The following articles provide more information about handling these errors.