Installing SQL Server Tools In order to set up an SSAS system, I am having to install Visual Studio (SQL Server Data Tools - Business Intelligence) but when I adding this to the instance, it says it has failed the rule "Same Architecture installation", and that I have to match the new installation CPU architecture with the CPU architecture with the instance. 

The instance I'm trying to link to is Microsoft SQL Server 2014 - 12.0.2269.0 (X64) Developer Edition (64-bit) on Windows NT 6.1  (Build 7601: Service Pack 1) running on Windows 7. The SSDT installation is Visual Studio 2013.

I'm not sure how I can achieve this.
g2server wrote in answer to the question 64 bit Microsoft SQL Server Data Tools on Stack Overflow:

As the others have said, there is only a 32 bit version.
The important thing is, if you’re running an x64-based SQL instance (64-bit), make sure to select “New Instance” on the Installation Type page, and NOT “Add features to an existing instance”. Not doing so will cause it to error out.


Community Wiki answer to document the solution on Stack Overflow found by Dave