[Rd] Several libraries won't load with (PR#6927)
andy_liaw at merck.com
Mon May 31 21:51:30 CEST 2004
> From: Uwe Ligges
> rmh at temple.edu wrote:
> > 3. Martin's comment
> > > Are you running another version of R simultaneously?
> > > IIRC, Windoze has the nice feature to sometimes lock
> files when
> > > it shouldn't.
> > isn't the problem. I have two Rgui and one iESS [R]
> running and all three
> > have loaded the Hmisc and multcomp packages.
> Maybe, but after you have loaded the package, you cannot
> overwrite it,
> because the dll files are locked (yes, dlls are locked when
> in use under
> Windows). So Martin's analysis was correct.
> Therefore you have to detach those packages you want to re-install or
> update (and also close all chm documentation - or even better close
> corresponding instances of R).
> > Rich
In `older' versions of R on Windows, detach()ing a package that contains dll
does not unload (or at least unlock) the dll. I have not tried the current
version. It's much safer to quit _all_ instances of R, restart, and
re-install the packages. Pre-compiled packages for Windows can be installed
in sort of four ways:
1. The Rgui menu
2. install.packages() from the R prompt
3. Download the zip file and unpack in the desired directory
4. Download the zip file and use install.packages(..., CRAN=NULL)
For #3 above, link.html.help() should be run at the R prompt post-unzip.
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