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2007 Jul 16
2
Error while fitting Partial Proportional Odds model using vglm
..., eta = eta, extra) 3: 19 elements replaced by 1.819e-12 in: checkwz(wz, M = M, trace = trace, wzeps = control$wzepsilon) Ironically, it works ok with Proportional Odds (change parallel = T above), but fails with PPO (parallel = F). I will appreciate any help to fix this problem. Thanks Rizwan Younis Grad Student University of Waterloo Waterloo, ON Canada