#13 Qucs-s + ngsprice: Missing ground complaint from ngspice

[John Coppens]

Hi all.
I'm trying to simulate a fairly simple circuit in Qucs-S + ngspice, as Qucs alone showed very long simulation times with the same circuit (too long to be practical - tens of minutes for a single transient sim).
The circuit seems to compile well, but ngspice complains about a missing ground (No Ground found. Please add at least one ground! Ngspice error...)

I'm not sure if models like IRF830 or BUZ71 are supposed to work. This list uses other mosfet configurations.

I suspect this is just an error of mine. Google doesn't even find "Please add at least one ground", (maybe some amnesia since it birthday?)

I'll attach the circuit.

[Vadim Kuznetsov]

I cannot reproduce this bug. The attached circuit is simulated without errors using the Qucs-S 0.0.20. The "Missing ground" error means that there is no "Ground" device (lumped components->ground) at the schematic. Ngspice cannot process the circuit without ground. But the attached circuit contains grounds. I attach the screenshot that shows that your circuit was simulated without errors.

[Vadim Kuznetsov]

Please use https://github.com/ra3xdh/qucs_s/issues to report bugs for Qucs-S