ngspice not loading poly library on Windows only

[k4kfh]

I am attempting to follow the video tutorial from Kasper Nielsen, which imports the SPICE model for a TL431 regulator. Everything goes fine until I try to simulate using ngspice, and I get this error:

If I remove the external SPICE model from the circuit, it simulates just fine, so ngspice is at least partially working.

Also, if I try the exact same file in a Linux VM, it works as expected. See this screenshot.

So it seems like something is wrong with the way ngspice is being installed from the Qucs-S installer. This is a nearly fresh install on Windows 10 - I ran the installer less than a week ago.

Is there some kind of easy fix for this, or is this a bug in how ngspice is being installed?

[ra3xdh]

The spiceinit script was missing in the installer. This issue has been already fixed in the continuous build. You may use this installer or wait for release. I am planning to make a 25.1.0 release in the next few days.

[k4kfh]

Got it, thanks for the quick response!

[k4kfh]

I uninstalled Qucs-S and then installed the latest 25.1.0 release and still got the same error. What should I try next?

[ra3xdh]

I cannot reproduce this problem. I have tried a fresh installation on WIndows 10 machine and everything works as expected. Check the path to Ngspice in Simulator->Simulator settings. Maybe you are using wrong Ngspice location. If nothing helps try to clean the old configuration in registry HKEY_USERS/Software/..../qucs

[k4kfh]

I figured out the issue, I had my SPICE_SCRIPTS environment variable set to a different path from when I was initially trying to solve the problem. I should have unset that environment variable when I installed the newer version of Qucs-S, but I forgot. Once I removed that environment variable, my Qucs-S install started behaving as expected. Sorry for the confusion!