Another issue is the mismatch between the number of parameters for a component in Qucs versus QucsStudio.
Capacitor Example:
Qucs capacitor has 3 parameters. C, V, Symbol
QucsStudio capacitor has 5. C, G, V, Symbol, Package
G is blank and you are stuffing “neutral” into 2 fields thus causing an error in QucsStudio. Errors occur for diodes and other components as well.
When I used to manually convert Qucs to QucsStudio, I would not try to match all the extra parameters. Obviously I can manually edit each component to get rid of errors. It’s harder for components with a large number of parameters like a diode.