I've attached a small piece of code, it will give me output in response to 'cat' when running in rgui.exe (windows) but not when executing it from within ESS. Is there a way to get it to return the output from 'cat' to the R buffer for debugging? Thanks Jim ## Practice file to try out evaluations for (m in 1:5) { y <- m cat(y,"\n") x <- y^2 cat(x,"\n") funct01 <- function (x,y) { z1 <- x + y cat(z1,"\n") z2 <- x * y z3 <- x^y results <- data.frame (z1=z1, z2=z2, z3=z3) return(results) } } =============================== Jim Maas University of East Anglia [[alternative HTML version deleted]]