"Time step too small" errors have plagued SPICE users for half a century.? It is not easy to predict when they will happen, and can be even harder to eliminate them.
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Download the LTspice
FAQ file.? Open it, and read until you find the section about "time step too small" errors.? Then read that section carefully.? It has a couple dozen things to TRY, in an attempt to get around the problem.? There are no guarantees.
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Andy
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