I try to creat the vias in my own PDK, so i goes to technology file manger to creat cdsvias.
After that i return back to Virtuoso layout editting, to press "O", it shows NO CONTACTS/VIAS defined in constraint group.
I check the "Help", I should go to window>>contraint group manger for my vias defination, but i did not find this option in there.
Do you have any idea to sovle this problem, let me get the required VIAS in the contraint group.
I think the chances of being able to help you are small without seeing what you've actually done.
Maybe customer support would be your best bet?