I am following FRDM-KW40Z 802.15.4 getting started tutorial. When I flash the MyWirelessApp-FreeRTOS-Coordinator, "Get Alternative File" error message pops up. It says "Could not find the following source file: V:\_ConnSw_kdsk1.3\framework\SecLib\build\CryptoLib\src\SW_RNG.c" and TeraTerm doesn't display anything. I was trying to look for the file SW_RNG.c file from connectivity software kit, but I couldn't find. What am I missing??