Hello. The simulation always halts here. is there something wrong?
(no, the assistant, while pretty good can not solve this issue)
It does work fine with the "virtual opamp" parts.
Did you tried to source the op-amps not from the VDD and VEE but with DC power source (basically the battery)?
I did not try that yet, but to me it should make no difference in my mind. I'll give it a try.