I'm currently trying to translate a gdb file of roads in the United States to a network dataset to run a network analysis with it. I found online the ESRI tutorial to do this. However, when I am converting between the two in ArcCatalog, I have to first convert the gdb to a feature dataset and only then do I get the option to create a network. However, when I click this option, I get the error message "There are no feature classes in the network container that can be added as feature sources". Could someone tell me what I'm doing wrong (or alternatively, tell me if there's another source of information I can use as a network dataset for the roads in the United States)? In case it's relevant, I'm running ArcMap 10.4 Thanks!