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...f there is maths happening in the function it might be passing something to it the is a 0 and so creating a Inf. But if there is a test of is.finite you will get "false" to NA or 0/1 or "0" (ie. Passing a character representation of a number) On Sat, 29 Mar 2025, 09:04 Behaylu Ayalew, <behaaya at gmail.com> wrote: > How are you dear Helper? > I am from Africa, Ethiopia , I have faced this type of problem > > Error in optim(seq(-3, 3, length.out = k), wle.fit, method = "BFGS", > control = list(maxit = max.it)) : > initial value in 'vmmin&...

...gt; rr = RM.w(XX, wt) library(psychomix)> rr.country1 = RM.w(XX, wt1) Error in optim(seq(-3, 3, length.out = k), wle.fit, method = "BFGS", control = list(maxit = max.it)) : initial value in 'vmmin' is not finite when I want to run RM.w Thank you in advance ! -- Behaylu Ayalew +251918768614 Ethiopia. [[alternative HTML version deleted]]