For some time I've been looking for a fairly straightforward circuit simulator with provisions for microwave application (transmission lines, discontinuities, coplanar structures and so forth). I've downloaded and used other applications from Sourceforge for years and have consistently been satisfied.
When I discovered QUCS, I thought my search was ended and indeed it has with an exception or two ... I would very much like to use the optimization feature but a full day's experimenting was unsuccessful; every effort produces an error message:
"ERROR: Cannot start simulator!"
I've tried to replicate precisely the example given in the help section of QUCS with the same result. I'm attaching a file that is representative of some of the things that I've tried. I wonder if you could run the file or examine it and perhaps advise me of my errors ?
Eureka, CA, USA