[R] the numimum number of fixed factors lme package can deal with

[Fang, Yongxiang]

Hello,

In my study, mixed effects model is required and the number of fixed
effects is very large. When lme package is employed, a model error is
displayed once the number of fixed  factors in the formula reaches 200. Is
this the maximum number of fixed factors can be handled by lme package?
If not, what is possible reason of the error message?

Thanks

Yongxiang