winbugs load inits显示“this chain contains uninitial

相应的winbugs程序如下，跪求解答：

model

{

   for (i in 1:numGroups)

   {

# numGroups is k, the number of di?erent probabilities

     x[i] ~dbin(p[i],n[i])

# In each group, x is the number of responses and n is the number of patients

     logit(p[i]) <-rho[i]

     rho[i]~dnorm(mu,tau)

     pg[i]<-step(p[i]-targetResp)

# Probability that the response rate for each group is ¿ than targetResp,which is fixed response probability|D*

   }

#Priors

     mu~dnorm(mean.Mu, perc.Mu)

     tau~dgamma(tau.alpha, tau.beta)

}

# Example data

list(x=c(0,0,1,3,5,0,1,2,0,0), n=c(0,2,1,7,5,0,2,3,1,0), numGroups=10,targetResp=0.30

mean.Mu=-1.3863, perc.Mu=.10, tau.alpha=2, tau.beta=20)

# Example of initial values

list(mu=1, tau=.10)