[.step] [.meas] - measurements fail when TSTART is parameterized and stepped

QSPICE
1

Hi

While using QSPICE i’ve dicovered that .meas fuctions are not working correctly when TSTART is parameterized and changes in every step. To illustrate the issue here is a simple circuit:

image

Without stepped parameterization the output is correct:

.meas umax max(v(u1)):
5 (at Time=0.000225)

However once .step param directive is inserted:

.step param freq 1K 10K 1K

Measurement starts to fail:

.meas umax max(v(u1)):
0 5
1 5
2 nan
3 nan
4 nan
5 nan
6 nan
7 nan
8 nan
9 nan

This doesn’t seem to happen when TSTART is set to 0 or to a fixed value

2

Thank you @KSKelvin for submiting bug report for me. According to Qspice challangelog

08/02/2024 Corrected an error in the post processor.

and my own tests error has been fixed.

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