clmm specify initial values with argument 'B'.

clmm r package erro: specify initial values with argument 'B'.how cn

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for (i in 2:7) {

  • mi <- hlme(fixed = bmi ~ 1+ age + I(age^2),

  •            mixture = ~ 1 + age + I(age^2),

  •            random = ~ 1 + age,

  •            ng = i, nwg = TRUE, 

  •            data = data.frame(a), subject = "id")

  • lin <- rbind(lin, c(i, mi$BIC))
  • }

Error in hlme(fixed = bmi ~ 1 + age + I(age^2), mixture = ~1 + age + I(age^2), :
Please specify initial values with argument 'B'****