I am having trouble viewing reports in our company's SharePoint site using the report viewer webpart. Here are the version details: SSRS 2008, MOSS 2007, IE9, Win 7 32-bit. I can view the Sharepoint listing of the .rdl files but when I try to open one, I recieve a generic error: An Unexpected Error Has Occured. Is this due to a missing IE plugin? Security?
Either use the methods in this link to turn on error messages, or you should be able to log on to the physical server to see the detailed error messages.
So, once again, this occured because I was not using HTTPS.