I am doing

model *cell_name* blackbox

to mark a subcircuit as blackbox in netgen lvs setup.tcl script and I can confirm with

puts [model *cell_name*]

that the model type for cell_name changes from subcircuit to blackbox. But then in the lvs report I see it is still comparing them as subcircuits (and thus failing lvs because they don't match, hench why I want to make them black box)... I'm not sure I understand how to achieve the blackbox behavior I want. Furthermore (maybe related?): the above describes the behavior after setting

model blackbox on

, when I set

model blackbox off

the behavior is the same except that

model *cell_name*

returns "module" which does not appear to be a valid model type according to the documentation. Nor is that difference of behavior documented in the section on model blackbox on|off in the documentation at http://opencircuitdesign.com/netgen/ maybe I'm looking in the wrong place?

@Sam Crow Thanks for articulating the problem. netgen normally flattens unmatched circuits, but you can override this behavior with the

-noflatten=<no_flatten_file>

option to the lvs command. Include all the cell names that you don’t want to flatten in the

<no_flatten_file>

.

Yep I'm just getting to that part thank you!