Dear R users. I have written my R code. It runs in the version 2.3.1, but not in the version 2.5.1. The error message is shown below. Error in .Fortran("DEPTH", u, v, as.integer(size), as.single(x), as.single(y), : Fortran symbol name "depth" not in load table Could any one advise me what I could do to run my code in 2.5.1? Sincerely, SUNGSU KIM [[alternative HTML version deleted]]