Run stops at 0/1

Hello,

With a simple design having just one input and one output pin, the stimuli was specified as a 1n pulse, and output was picked on schematic as the output pin.

After clicking the green Run button (with white right-headed triangle), the status always stays at “running – 0/1” without progressing. If we instead choose Monte Carlo instead of “Single Run, Sweeps and Corners”, it always stays at 0/200.

The library was tsmc18rf.

Please advise us on what is run with our simulation.

G