I am using report viewer control on my asp.net web page. I have drill down report that I open using report viewer control with ProcessingMode="Remote".
Sometimes I get "Some parameters or credentials have not been specified" error, while I toggle the drill down report. I am only using Page_Load event on my report, where I just check the postback property, if the postback is false then I set all the parameters
otherwise, do nothing, the report viewer automatically syncs with report server to get the data for drill down report.
Once I get the above error, I tried to REFRESH the report, but still get the same error.
I am not even able to catch this exception in my page load event, it seems the report viewer control understands and consumes this exception and returns the above said error message.