DTO and GPIO Output Test File Error

I am trying to run an example program shown at https://github.com/BestFriendofDoug/PRUSS-C but I can’t get an output on my GPIO pin P9.12. All instructions should be available and possible errors/solutions. I have been having trouble with the following error at times:

INFO: Starting PRU_memAccess_DDR_PRUsharedRAM example.
INFO: Initializing example.
./blinkled: symbol lookup error: ./blinkled: undefined symbol: prussdrv_load_datafile

but re-running the Makefile in /root/PRUSS-C/am335x_pru_package/app_loader/interface/ should rebuild the libprussdrv.so file and solve that issue.

Any help on getting this example to run would be appreciated!!