How to find the pulse length with MDL?

Two issues:

1. The dir argument should be 'rise or 'fall (no close quote after the name - that's not the correct syntax in MDL)
2. The threshold should be above 0.0 because otherwise it never crosses if (if it starts at 0).

Here's a suggested MDL file which worked for me:

alias measurement tran_pulse
 {
    run tran
    export real rise_time       = cross(sig=V(BL), dir='rise, n=1, thresh=0.01)
    export real fall_time        = cross(sig=V(BL), dir='fall, n=1, thresh=0.01)
    export real pulse_length = fall_time - rise_time
  }

run tran_pulse

Andrew

Worked perfectly. Thank you so much.