Hi Kory, here are the steps:
1) Open ArcCatalog and navigate to my shapefile of railroads in the US
2) Right click on it -> New -> Network dataset
3) name it railroads_ND
4) click yes to model turns
5) click connectivity -> I see source: the railroad file, connectivity policy: end_point, number 1 checked
6) How would you lie to model the elevation of your netwrok features? Here I choose 'None' because I don't have elevation fields (should I set elevation fields> if so, how??)
7) Do you want to establish directions? Yes. In the Network Direction Properties I choose 'RRname" as the name
😎 Finish
I then get the message "could not create the newtork"
Thanks!!
PS. I will ask this in the Network Analyst space