Timestep too small when using .step param

QSPICE
1

Hi,

I have a simulation file which I cannot share. So far I was using a constant parameter:
.param COUPLING_COEFF = 0.85
The simulation was working perfectly. I want to extend the simulation with:
.step param COUPLING_COEFF 0.65 0.99 0.2

The first iteration ran nicely, while the second one crashed, surprisingly it crashed at a value where the simulation with the constant parameter did not crash previously.

Fatal error: Timestep too small(1.25e-18) at t=0.000470005

Any ideas of what might be going on?

Regards

2

Try .step param COUPLING_COEFF list 0.65 0.99 0.2
Add the word list!

3

Thanks for the proposed change, unfortunately it also failed :confused:

Edit: it worked when adding a 0.5 parameter to the list of simulations:
.step param COUPLING_COEFF list 0.7 0.5 0.85 0.9 0.95

However it did not work for:
.step param COUPLING_COEFF list 0.7 0.75 0.85 0.9 0.95
.step param COUPLING_COEFF list 0.6 0.75 0.85 0.9 0.95

In the last one, the error was the same and at the same moment, however it failed in 0.7 instead of 0.85.