Unable to perform simulation for astable multivibrator cicruit. As i have uploaded device modelling file also and it shows kicad to ngspice conversion succesful. but after that we are getting these type of waveforms . What was the error sir?
You have not selected the LED from eSim libraries.
Remove the LEDs present in the schematic at the moment, go to -> Place Component tool -> Type eSim_LED and use those in the schematic, Redo necessary steps.
[Step time in transient analysis should be 10ms or a nearby value]