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...correctly. Would anyone be willing to have my dataset sent so they can check it out if that would help solve the issue? Thank you! Hillary (hrobison at unr.nevada.edu) > # trial, all, weighted > topo8 <- gam(PA ~ s(SLOPE10) + s(ASPECT10) + s(GYADEMPLUS) + s(TRI) + s(HLI) + s(PLAN10) + s(PROF10), family=binomial, data=topox, weights = w0) Warning in eval(expr, envir, enclos) : non-integer #successes in a binomial glm! Error: cannot allocate vector of size 60865 Kb > topo9 <- glm(PA ~ SLOPE10 + ASPECT10 + GYADEMPLUS + TRI + HLI + PLAN10 + PROF10, family=binomial, data=topox, weights...