Warning: Singular matrix. Check node N09 Added gshunt=1e-13


How to solve this warning? anyone can help?


Just connect that yellow trace to gnd

Nice… solved. Thank you.

this is how I made my schematic

more detail here QSPICE/PWM_example_SRbuck at main · physicboy/QSPICE · GitHub

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Singular matrix warning can commonly occur when a node is floating (i.e. no path to GND). + and - pins of Switch is isolated and that why with - pin connect to Gnd you can resolve this problem.

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