Hello,
On Windows Server 2008 R2 SP1 andSharePoint 2010 SP1 we are receiving the following error while trying to open Excel document in Excel Web Part. It shows the standard error: "An error has occured".
When exploring ULS we found the non-informative error (An error has occurred):
There was an error in communicating with Excel Calculation Services http://domain:port/cced17b7a4c74d56827ad40c61795580/ExcelService*.asmx exception: An error has occurred. [Session: User: username].
Error ID is 5240, however, this asmx service file loads normally by itself (using the same link from error message).
All needed features and services are enabled. IISRESET done a lot of times, even Excel Service Application was re-created.
Could you please help us with this problem or at least how to get more information about this "Error occurred"?
Thank you!