RE: Complicated Management Reporter Migration
Paul,
I am not sure your problem is what I think it is, but I'll take a stab at it anyway. When I first started to deploy MR for clients, I didn't always use the data mart, which means I sometimes used the legacy approach. This approach connected MR directly to the databases, in much the same way FRx worked.
After figuring out this was not the optimal approach, and that legacy was not going to be supported going forward, I began to use the data mart approach exclusively. One wrinkle, when moving from legacy to data mart, the company databases did not have identical names.
At first, I would contact technical support every time I encountered this, or similar problems, and they would help fix the problem with the "Dynamics AX Management Reporter 2012 TDBX Update Diagnostic" tool - pay no attention to the fact it has AX in the name... The tools works for GP and SL as well.
This tool allows you to make changes to existing Dimensions by processing a TDBX file through the Utility, a bit like PSTL in function only. I would recommend logging a technical support incident, if this sounds like the problem your are facing, if not, sorry to have wasted your time.