[g2server][1] wrote in answer to the question [64 bit Microsoft SQL Server Data Tools][2] 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.

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<sub>*Community Wiki answer to document the solution on Stack Overflow found by [Dave][3]*</sub>


  [1]: https://stackoverflow.com/users/2293226/g2server
  [2]: https://stackoverflow.com/a/24992846/440595
  [3]: https://dba.stackexchange.com/users/70109/dave