I use a tool (Centrality of Urban Network Analysis) that requires two input files: a polygon layer made of buildings and a Network Dataset. Since my area of analysis is quite huge I divided it into 40 parts. I put all the polygon layers in a folder and all the ND into another.
I want to iterate the process with this tool but problem is, in ModelBuilder, we can only use one iterator, Iterate Features Classes in my case. Since we cannot use two iterators in ModelBuilder, I wonder how it is possible to iterate a process when someone is using a tool that requires two different inputs.