On 19/01/2012 11:19 AM, Adrian Dragulescu wrote:
Hello,

I'm on Windows, and according to the documentation R searches along the
search path when looking for dll's for dyn.load.

For illustration, I've copied the XML.dll from package XML in the C:/Temp
folder

    if (file.exists("C:/Temp/XML.dll")) {
      Sys.setenv(path = paste("C:/Temp;", Sys.getenv("path"), sep=""))
      dyn.load("XML.dll")   # doesn't find it!
    }


    head(strsplit(Sys.getenv("path"), ";")[[1]])  # C:/Temp is there

    dyn.load("C:/Temp/XML.dll")  # works fine

Am I misreading the documentation?

I believe that search is done by Windows, and different versions are very inconsistent about search order. However, one thing I would guess is that recent versions would require backslashes rather than forward slashes in PATH. When R gets a path, it generally translates the slashes, but if you're relying on Windows to do it, you're stuck with what they decide to do.

Duncan Murdoch

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