[R] lmer Error message

[Martin Bulla]

Does anybody knows what this error message means: 
Error in object$terms : $ operator not defined for this S4 class

I have peformed the following steps:


> library(lattice)

> library(Matrix)

> library(lme4)

> inkm inkm$Gamie glm.incm drop1(glm.incm,test="Ch") Error in object$terms : $ operator not defined for this S4 class


Your suggestin would be of a greatl help to me,
Martin