R help - Sep 2006 - Unidentified warning message in Portuguese

What is the meaning of this message?

  Warning message:
  Realizando coer??o de LHD para uma lista 

I tried to do something like this:

test <- function(x) {
  rval <- NULL
  m <- mean(x)
  s <- sd(x)
  rval$m <- m
  rval$s <- s
  y <- x[abs(x - m) > 3 * s]
  rval$y <- y # this is the critical line
  return(rval)
}

except that in the example above the critical line does not give
any error, while in the real (much bigger) example it does, for
things like:

test(c(runif(100), 100))

Alberto Monteiro