I am going to enter pedigree data into pedsys to create a pedigree data base, I have downloaded the program and installed it, but when I try to run the program the following error is shown:

ERROR: The environment variable PEDSYS is missing

? FORTRAN Runtime Error:? Format string missing opening (? WRITE(UNIT=6,...

what should I do to solve the problem? is it about me not having Fortran? or it is because of my windows version?

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