I placed a few vias manually. I get "Un-Routed Net Constraint."
How can I fix that?
The Via not assigned to any net(M3).So, you getting "Un-Routed Net Constraint" Error.
You can assign the net (M3) by following steps
a.**Right click on the via->Find Similar Objects**
b.**In the Find Similar Objects window, Modify NoNet -> same-> OK**
Now, The Error cleared.