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...es, their stderr, deviance, predicted values...) reliable? Can I still go on and interpret them? How much caution should I exercise for these results with this message? ########## > mmm6 <-glm(freq~x+y+x.2+y.2+x.3+y.3+x.4+y.4+x.5+y.5+x.6+y.6+xy ,family=poisson(link = "log"),data=ddd2) Warning message: In glm.fit(x = X, y = Y, weights = weights, start = start, etastart = etastart, : fitted rates numerically 0 occurred ########## Thank you so much, Insu Paek ************************************************* Insu Paek Educational Testing Service Rosedale Road MS - 02P Pr...