I am new to orbital calculations and online resources, so I was hoping someone would be willing to help me get started. I have downloaded the space-track Astrodynamic standard library and I am attempting to use their example code for the SGP4 propagator, however I can't even seem to get the input and output files correct... I made a text file with the TLE and 6P-Card data, but it won't recognize it. Would someone be able to step me through the process of using the example code from space-track for the SGP4 propagator? It should really just be entering the input TLE and a name for the outputs, but for some reason it won't work for me.