[精彩WinBUGS答问]为什么会出现 multiple definition of node-经管之家官网！

新接触这个计量软件，想估计带跳的CKLS短期利率动态模型，自己攥的程序如下：
model {
k~dnorm(0,1)
mur~dnorm(2.3,0.25)
gama~dnorm(1,0.25)
a~dgamma(2.5,0.025)
sigmar2<-1/a
kesai~dnorm(u,tau1)
u~dnorm(2,0.25)
tau1<-1/sigmaj2
b~dgamma(2.5,0.025)
sigmaj2<-1/b
zt~dnorm(0,1)
J~dpois(lamda)
lamda~dnorm(0,1)
for (i in 1:N-1) { r[i+1]<-r+k*(mur-r)+sigmar2*pow(r,gama)*zt+J*kesai}
}
data
list(N=10, r=c(2.4155,2.4116,2.4093,2.4101,2.4041,2.3994,2.3984,2.3954,2.3830,2.3400)
)
inits
list(k=0.01,mur=2.3,sigmar2=0.25,gama=1,u=1.5,sigmaj2=0.25,zt=0.01,lamda=0.01)
可是编译的时候，出现了multiple definition of node r[2]的问题，不知何解，各位大神，请不吝赐教！拜谢！！