daq2 reference design AD-FMCDAQ2-EBZ with Xilinx ZC706

I have just built the analog devices reference design branch hdl_2016_r1 which is listed as compatible with xilinx Vivado 2015.4.2. 

I was able to generate a bitstream, and compilation in Cygwin worked without issues, however in vivado under synthesis I am getting the following "critical warning" which seems to be associated with a single line constraints .xdc file which I have also included below: 

[Netlist 29-160] Cannot set property 'BOARD_PIN', because the property does not exist for objects of type 'pin'. ["c:/AnalogDevices/hdl/projects/daq2/zc706/daq2_zc706.srcs/sources_1/bd/system/ip/system_axi_rstgen_0/system_axi_rstgen_0_board.xdc":3]

#--------------------Physical Constraints-----------------

set_property BOARD_PIN {reset} [get_ports ext_reset_in]

I want to make sure that the original reference design is working as expected before I begin modifying it for my project.