FYI - My advice about adding GMIN across current sources, is that you should specifically add them to your current sources, by adding a resistor in parallel with them.
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The checkbox in the Control Panel's Hacks! tab is not permanent (it goes away when you close and then re-start LTspice), and it does not solve any topology problems and won't eliminate that error you had.? If you think you need a conductance added across your current sources, do it by adding resistors to the schematic!? That is my advice.
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Andy
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