I was refreshing my memory regarding restart steps in WRF. In the Restart Run - wrf.exe page https://www2.mmm.ucar.edu/wrf/OnLineTutorial/CASES/Restart/wrf.php.
I'm certain that the restart file is being created every 24 hours in the tutorial. restart_interval = 1440 (so 24 hours) is being used in the Restart Run page, and also in Single Model Domain Case.You should have already completed the Single Domain Matthew Case before attempting a restart run. In the Single Domain case we started the model at 2016-10-06_00 and ran for 48 hours, creating a restart file every 12 hours.