I haven't seen any further discussion to this issue beyond Uwe's response below, so I think I have something to add:
I'm having this same issue using the standard R2OpenBUGS schools example (below). I find that I get the 'nrow' error when I use OpenBUGS 3.2.2, but when I use OpenBUGS version 3.2.1 the script executes as expected. I'm using R2OpenBUGS 3.2-1.4 on a Mac Lion OS calling from R 2.15.0 GUI 1.51 Leopard build 32-bit (6148) using WINE. This might be a communication issue between R2OpenBUGS and OpenBUGS 3.2.2, but I'm a Mac newbie so I assumed it was a user error initially. If you need a quick fix, try v3.2.1 and see if that doesn't fix things. db #Load the OpenBUGS Package - make sure XQuartz is running library(R2OpenBUGS) #schools data in the R2OpenBUGS library data(schools) #define the model nummodel <- function(){ for (j in 1:J){ y[j] ~ dnorm (theta[j], tau.y[j]) theta[j] ~ dnorm (mu.theta, tau.theta) tau.y[j] <- pow(sigma.y[j], -2)} mu.theta ~ dnorm (0.0, 1.0E-6) tau.theta <- pow(sigma.theta, -2) sigma.theta ~ dunif (0, 1000) } # write the model code out to a file write.model(nummodel, "nummodel.txt") model.file1 = paste(getwd(),"nummodel.txt", sep="/") #prepare the data for input into OpenBUGS J <- nrow(schools) y <- schools$estimate sigma.y <- schools$sd data <- list ("J", "y", "sigma.y") #initialization of variables inits <- function(){ list(theta = rnorm(J, 0, 100), mu.theta = rnorm(1, 0, 100), sigma.theta = runif(1, 0, 100))} #set the WINE working directory and the directory to OpenBUGS - change the OpenBUGS.exe location as necessary WINE="/opt/local/bin/wine" WINEPATH="/opt/local/bin/winepath" OpenBUGS.pgm="/Users/[username]/.wine/drive_c/Program Files/OpenBUGS/OpenBUGS322/OpenBUGS.exe" #these are the parameters to save parameters = c("theta", "mu.theta", "sigma.theta") #run the model schools.sim <- bugs(data, inits, model.file = model.file1,parameters=parameters,n.chains = 3, n.iter = 20000, OpenBUGS.pgm=OpenBUGS.pgm, WINE=WINE, WINEPATH=WINEPATH,useWINE=T) -- View this message in context: http://r.789695.n4.nabble.com/R2OpenBUGS-quesion-tp4636392p4641343.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.