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My first play with Circuit Lab (though not new to simulation!): I'm getting some really silly answers on the simulation of a simple two-opamp circuit, and wonder now if and how I define the supply voltages for the opamps? The actual circuit has been checked and re-checked many times, and has been used before.

False Alarm! I've now found the answer myself - had not realised you can choose opamps with supply rails. Now all works just fine. Brilliant facility!

Thank you for posting the solution! Too often folks find the answer and don't post them.