R help - May 2014 - lognormal frailty in frailtypack

Hi everyone

I am attempting to estimate a model with a frailty effect distributed as 
a lognormal variable.I am using the following code: 
frailtyPenal(formula, data, ..., RandDist = "LogN")

I get the following error message:
Error in frailtyPenal(Surv(,) ~  + ,  :
   unused argument(s) (RandDist = "")

What can I do? Thanks for the help

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