Hello,
As a part of ES1 license installation for the UltraZed-EG SOM, our QSC states creating an init.tcl file and placing it in the Vivado/2017.1/Scripts folder. Xilinx has changed the name of the file from init.tcl to Vivado_init.tcl file in 2017.1 release. So, please rename the tcl file name when using the Vivado 2017.1 release.
--Josh