I think I run into a bug in QSPICE, took a bit to figure out that it is related to option SaveParam.
When using “.step param” in AC simulation and “.option SaveParam” is activated. QSPICE stops after the first step with the error below but works as expected by removing the .option SaveParam. Running a stepped transient simulation with SaveParam is no problem.
So here is a netlist to demonstrate the issue:
V1 N01 0 sin 0 1 10K AC 1
R1 N01 out Rs
C1 out 0 10n
.param Rs=1K
.step param Rs list 1K 10K 100K
.ac lin 10 100 100K
.option SaveParam
.end
The simulation stops with the following error:
1 of 3 steps: .step rs=1000
2 of 3 steps: .step rs=10000
Fatal error: .step doesn’t work when the number of saved data traces changes(from 9 to 8).
Sorry about the inconvenience.
Yes, I run into this issue on another computer with an older Version. Then I updated but same thing. To report the issue I used my laptop, updated QSPICE and generated the netlist from schematic. Same thing on the second computer.
From your response I now gave it a try with just the netlist pasted into the schematic window, again with the same result.
See the attached picture.
