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Hi,
For loop gain, I am using a method mentioned on YouTube. (<https://www.youtube.com/watch?v=BLXNkmubQzA>)
But I face some errors.
Can anyone help me with loop gain?
Thanks

Very likely the simulator did not find an operating point for the circuit and following AC analysis was aborted.

Try to comment out the ac analyses and do only a `op` operating point calculation. Check your circuit if this fails. Usually failure happens due to floating nodes / missing supplies.

I second Stefan's opinion. As a side note, you may want to increase the iteration step number before it too quickly gives up the convergence (add these to the top of your netlist, of course you can change these numbers based on your need):
```.OPTIONS itl1=200```

Also you do have to be careful where to break the loop if you want to use this method and if your beta is not one (meaning if you have something in your feedback network).