Can you please include the missing LTspice symbols and SPICE models?? We can't help you without them.
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LM317A_TRANS
ADA4084-2
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(The latter might be in newer LTspice versions, but the computer I am using at this moment does not have them.? I'll have to go to the other.)
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Also, 1N4007's SPICE model is missing.
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You used "opamp" rather than "opamp2".? The "opamp" model is unbounded (has no power supplies, so voltages can be infinite) and this can cause conversion convergence problems.
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Andy
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