Report Is Unavailable or Session Has Expired Error Occurs

Environment

Product	Progress® Telerik® Reporting
Version	Q2 2012 and later
Report Viewers	Legacy ASP.NET WebForms Viewer

Description

The described scenario and suggested solution relate to the legacy ASP.NET WebForms ReportViewer. It is recommended that you migrate to the HTML5 ReportViewer.

An error message that the report is unavailable or that the session has expired error message occurs when using the legacy ASP.NET WebForms ReportViewer.

Cause

The legacy ASP.NET WebForms ReportViewer depends on the ASP.NET Session.

Solution

If the session expires, refresh the page with the legacy ASP.NET WebForms viewer.