Create Utility Network not working

[Chu_Chu2]

I am having issues starting off running utility network in Pro. I have pipes, manholes and pump stations. Once I run it with the boundary area as the service territory.. I get absolutely no output. Any reason why?? 

I do get structure line, structure boundary and structure junction added to my table of contents but again they are empty . 

[VishApte]

Create Utility Network tool only creates a utility network with mandatory Structure domain. 

See note in the help doco: The feature dataset is now populated with a utility network dataset and the structure network classes.

If you want to add Water domain, you need to run Add Domain Network tool.

This is a long-winded path to build UN. Suggest you use Asset Package method.