Getting pulse width values with cross function (non-periodic signal) using Calculator

Hi all.

I want to get a vector of pulse width values for a non-periodic square signal using Calculator.

I'm using cross() function to perform measurements in the following way:

cross(VT("/p10keV1") 1.65 1 "falling"  t "time"  )-cross(VT("/p10keV1") 1.65 1 "rising"  t "time"  )

However, this expression just return the first substraction, not an array substraction (Be aware that I'm using multiple values on cross()).

What should I change to get all the arrays?

Thanks.

Jorge