Version Found: v1.7
Version Resolved and other Known Issues: See (Xilinx Answer 45195).
MIG 7 Series VHDL only designs have removed the xsim_run.bat/.sh script and related files from the ./sim directory, but the Vivado Simulator tool still supports VHDL and mixed-mode simulations.
For VHDL designs, you should use ModelSim and the provided sim.do script located in the ./sim directory.
10/16/2012 - Initial release