Report is unavailable or session has expired.

[Jelte]

Hello,

I am having a problem with the Report tool in my ASP.Net application.
I already found your KB artikel about this issue, but as far as i can see that those options arent valid in this case.

My application runs on 3 different servers.
1. my development machine, works like a charm.
2. Our "live" test server. customers use this to test out new releases and patches. Here it also works like a charm.
3. Live enviroment. In 90% of the cases we get this error.

What happens:
In a multipage report it can happen that page 1 works, page 2 doesnt and page 3 works again. If i would run the same report 1 minute later it could happen that it wont load at all.
Sometimes, images wont show up in the report. Barcodes sometimes render, sometimes they dont.

What could this be?

Regards,
Jelte

[Jelte]

Anybody an idea?

[Massimiliano Bassili]

If the same app runs fine on other machines, clearly the problem is machine specific. The first thing I would do is check the event viewer for errors. Second compare the application settings (e.g. whether the web.config is correct, compression modules etc.) and of course the IIS settings (application pool etc.).
If anything does not pop up there, use a web debugging proxy (fiddler) to see what is returned from the web server.

Cheers!