The helper fortran files should be compiled in the same project as the code in the other folders.

The fortran code also writes to a number of blank existing txt files.  We have written the code assuming all of these files already exist,
but if you have not created them yourself you can get fortran to create these files on the first run by switching the syntax of the OPEN commands
from OPEN (UNIT=XXX, FILE="YYY.txt", STATUS="OLD", ACTION="WRITE", POSITION="REWIND") to
OPEN (UNIT=XXX, FILE="YYY.txt", STATUS="NEW", ACTION="WRITE", POSITION="REWIND"), where XXX is the particular unit number and YYY is the file name.
This should be able to be produced in one step by using a text editor to find/replace

STATUS="OLD", ACTION="WRITE"

with

STATUS="NEW", ACTION="WRITE"