Hi, everyone.
I want to get Wien Bridge Oscillator with AGC from this example (the last scheme on page — Fig 3.4.11)
http://www.learnabout-electronics.org/Oscillators/osc34.php
I plotted this scheme but received error. What's wrong with my circuit?

 

I'm sorry it's old .asc file
That is correct

 

For starters, V2 is upside down. (minus times a minus)

 

For starters, V2 is upside down. (minus times a minus)

Thank you very much. But I have also found my mistake.