New simulator in KiCad failed plot transient analysis

[Prototype]

Hey Guys,
I am new to KiCad simulation, which they have introduced in their nightly build. When I tried to do a transient analysis on a low pass filter, the simulator shows some error. I don’t know what the error actually mean ?? Any thoughts ??

Circuit: KiCad schematic
Background thread stopped with timeout = 0
Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
Warning: singular matrix:  check nodes vin and vin
Note: Starting dynamic gmin stepping
Trying gmin =  1.0000E-003 Note: One successful gmin step
Trying gmin =  1.0000E-004 Note: One successful gmin step
Trying gmin =  1.0000E-005 Note: One successful gmin step
Trying gmin =  1.0000E-006 Note: One successful gmin step
Trying gmin =  1.0000E-007 Note: One successful gmin step
Trying gmin =  1.0000E-008 Note: One successful gmin step
Trying gmin =  1.0000E-009 Note: One successful gmin step
Trying gmin =  1.0000E-010 Note: One successful gmin step
Trying gmin =  1.0000E-011 Note: One successful gmin step
Trying gmin =  1.0000E-012 Note: One successful gmin step
Trying gmin =  1.0000E-012 Note: One successful gmin step
Warning: singular matrix:  check nodes vin and vin
Warning: Dynamic gmin stepping failed
Note: Starting source stepping
Supplies reduced to   0.0000% Warning: singular matrix:  check nodes vin and vin
Trying gmin =  1.0000E-002 Note: One successful gmin step
Trying gmin =  1.0000E-003 Note: One successful gmin step
Trying gmin =  1.0000E-004 Note: One successful gmin step
Trying gmin =  1.0000E-005 Note: One successful gmin step
Trying gmin =  1.0000E-006 Note: One successful gmin step
Trying gmin =  1.0000E-007 Note: One successful gmin step
Trying gmin =  1.0000E-008 Note: One successful gmin step
Trying gmin =  1.0000E-009 Note: One successful gmin step
Trying gmin =  1.0000E-010 Note: One successful gmin step
Trying gmin =  1.0000E-011 Note: One successful gmin step
Trying gmin =  1.0000E-012 Note: One successful gmin step
Note: One successful source step
Supplies reduced to   0.1000% Warning: singular matrix:  check nodes vin and vin
Supplies reduced to   0.0000% Warning: singular matrix:  check nodes vin and vin
Warning: source stepping failed
Transient solution failed -
Last Node Voltages

[EEngineer]

I have not familiar Kicad simulator. But the output looks similar to spice. I think their is some problem with the AC supply in your circuit. I think, It should have two terminals with one terminal connected to ground. Can you find any other AC supply with two terminals, in Kicad??

[Prototype]

Thanks for the replay. There isn’t any other AC Symbols in list.

[Programmer]

Have you tried to change the spice settings ( Voltage, frequency…etc ) for that particular ac symbol in you schematics ?? If not, try and report us back!!

[Prototype]

Yes, changed the voltage, frequency etc for the ac symbol, but no change yet…still same error!!

[Mr.Tesla]

Hello, you have to find a new ac symbol as mentioned by @EEngineer. Just like this,

After that, make schematics like this,

For your circuit, the cut off frequency will be 16 Hz, if you feed 100 hz to spice settings in new ac supply the final plot look like this,

Regards!

[Prototype]

Thank you so much @Mr.Tesla. You have solved heck of my problem.