Microsoft ReportViewer: Session Expired Errors

Question

The project is ASP.NET 2.0, I have never been able to reproduce this myself, but I get emails informing me it happens to clients many times a week, often a few times in a row.

Answer 1

What is the question? The session expired and they cannot continue.

Check the report process speed. Build in some kind of benchmark or simply ask them to measure the report processing.

Easily can be that it is working for you, but not for them (slower network, more data to handle, slower DB server, and so on).

Edit: Here is another explanaition and maybe a solution for the problem, but I don't recomment to set the worker process number to 1 on a procudtion environment.