hi Andrew, totally understand and was wondering if some quick clue, not expecting exact answer yet. I guess I might have to create a small test case to reproduce and get back to you. P.S., the Important parameter values from prompt: start = 0 s outputstart = 0 s stop = 1 s step = 1 ms maxstep = 10 ms ic = all useprevic = no skipdc = no reltol = 100e-06 abstol(V) = 1 uV abstol(I) = 1 pA temp = 27 C tnom = 27 C tempeffects = all errpreset = conservative method = gear2only lteratio = 10 relref = alllocal cmin = 0 F gmin = 1 pS thanks, David
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