ASP.NET session has expired or could not be found -> Because the Session.SessionID changes (Reporting Services)

Question

1.-I\'m using reporting services and sometimes I get this error ASP.NET session has expired or could not be found when I try to load a report.

2.-I real

Answer 1

I had the same issue on report viewer page when the web site was accessed from outside intranet. hardvin's suggestion saved the day for me which is to set this.rvReporte.KeepSessionAlive = false; this.rvReporte.AsyncRendering = false;

I changed the property on the control itself. I am using report viewer on a user control which raises a custom event for supplying parameters programmatically at the host page instead of prompting the users.