To share with other Management Reporter 2012 users out there, we received the following error for a report: An unknown error has occured while processing the report. The report would fail and there were no clues in the report status window.
Through trial and error, we discovered the issue was a blank line in the column headers. There were actually two blank lines, but only one of the blank lines caused the report to completely fail. The one blank line which caused the report to fail was under another column header line that was boxed and spread. We’ll have to do more testing and we passed this on to Microsoft support.
There is also the column header code @Blank which may be used if there is an issue until resolved.
The Management Reporter 2012 build was: 2.1.1026.37.