Dear friends, I'm on windows, R 2.15.1 - library(ggplot2) #compiled under 2.15.2 qplot(mpg, wt, data=mtcars, colour=cyl) # directly from the qplot help Error in rename(x, .base_to_ggplot, warn_missing = FALSE) : could not find function "revalue" Is that due to a .1 lack in R All the best Troels Ring