Fourier analysis with Xyce backend is broken

[ra3xdh]

Fourier analysis with .FOUR gives no output if the latest Xyce v7.4 is used. The Qt4 Qucs-S version is affected too.

• Change .FOUR output file name extension
• Add support for Parameter sweep+Fourier

[tvrusso]

This is probably due to a change to .FOUR output that was put in place in Xyce 7.4. According to the release notes:

[tvrusso]

So instead of looking in "netlist.four" you have to look in "netlist.four0" even if it's not a .step netlist. If the netlist DOES have .step in it, then each step's fourier output is in a different file.

[ra3xdh]

Thank you for pointing this. I will correct the Fourier analysis support in the next few days.

[ra3xdh]

I have fixed a .FOUR simulation for Xyce. Old circuits are operational again now. The combination of .FOUR+.STEP will require a bit more work, because it will be needed to modify the simulation output parser.