Hi Grasshopper,

I'm having this issue having moved a report from SSRS 2005 to SSRS2012. I have 2 options to edit this report. One being the Report Builder 3.0 - running from the report server. The other being Visual Studio 2012 (SQL Server Business Intelligence). I can't see how to apply your solution in either case because looking at the Tablix Properties doesn't display a Groups tab. Would you be so kind as to explain what tool you're referring to and how I can get access to the same area. I'm very grateful for any assistance.

David