I’ve updated a few of my environments to CU8 over the last couple of weeks and this one caught me out. When you get to the binary part of the install if you are applying CU8 on top of an environment then you might not be able to select the AOS to be updated after you have updated the Report Viewer component and the message says “please uninstall the Visual Studio 2010 Dev Tools”
This is actually referring to the AX2012 Visual Studio tools. You will have to run the AX R3 product CD and choose the option to remove the Visual Studio Tools. Then when you restart the updater it will allow you to have the AOS selected for the update.
If you notice down the bottom of the update installer there is a new option for Visual Studio 2013 Dev Tools. So if you want to install the AX Visual Studio tools back in for R3 CU8 you will have to update Visual Studio to 2013 SP2 as a minimum.
So if you are trying to update the R3 Demo VM that Microsoft ships to partners keep this in mind as it has the Visual studio tools installed.