Tfs reports not updating
You should set start and end dates for the sprints themselves.
In my case, the stored procedure used as the data source was returning multiple data sets (due to some debugging code that I had left in there).
From here you can select your dataset and go to its properties and refresh the reports attached dataset's fields. Next time you'll run the report, new file will be created and it will have all the new fields from the updated SP.
ok, this maybe an older thread, but I kept running into the same problem on occasion.
I have updated the SP for the attached dataset that the tablix is using.
The refresh worked fine and I can see my new fields in the shared data set when I look in the Fields tab.