[R] install.packages() - old version deleted, new version did not install

Jon Olav Skoien jon.skoien at jrc.ec.europa.eu
Mon Dec 20 09:41:13 CET 2010

On 12/17/2010 6:22 PM, Duncan Murdoch wrote:
> On 17/12/2010 11:13 AM, Jon Olav Skoien wrote:
>> Dear list,
>> (R 2.12.0, Windows 7, 64bit)
>> I recently tried to install a new package ("spacetime"), that depends on
>> "sp" among others. I already had the last one installed, but there was
>> probably a newer version on CRAN, so the command
>> > install.packages("spacetime")
>> also gave me:
>> also installing the dependencies ‘sp’, ‘zoo’, ‘xts’
>> sp was already loaded in this session, so installation failed:
>> package 'sp' successfully unpacked and MD5 sums checked
>> Warning: cannot remove prior installation of package 'sp'
>> Unfortunately, the warning should rather say:
>> "cannot completely remove prior installation of package 'sp'"
>> R managed to remove most of the prior installation of sp, except for the
>> .dll. I could go on using sp in the existing sessions, but not load the
>> package in a new session or open the help pages. This has happened to me
>> several times, and the only solution I have found to this is to close
>> all R-sessions and install the package again. This is normally ok, but
>> this time I had some long-time computations running in another R-session
>> that I did not want to interrupt. For the next time, is there a way to
>> reinstall a package without interrupting running R-sessions?
>> For me it seems like the cause of the problem could have been solved by
>> checking if the .dll can be removed before removing the rest of the
>> package, by adding something like the following in utils:::unpackPkgZip?
>> if (unlink(paste(instPath,"/libs/x64/sp.dll", sep = "")) != 0)
>> warning("cannot remove...")
>> before
>> ret<- unlink(instPath, recursive = TRUE) (line 95)
>> x64 in the path would have to be changed to something architecture
>> dependent...
> Could you try out the new 2.12.1 release? I recall hearing that 
> something like this had changed, but I can't spot the NEWS item right 
> now.
> Duncan Murdoch

It seems it didnt change yet...
I installed 2.12.1 (on a different computer, still Windows, but Vista 
and 32 bit), and after installing and loading sp in one session, I 
opened a new session and got:

R version 2.12.1 (2010-12-16)
Copyright (C) 2010 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i386-pc-mingw32/i386 (32-bit)

 > install.packages("sp")
Installing package(s) into ‘C:\Users\Jon\Documents/R/win-library/2.12’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
provo con l'URL 
Content type 'application/zip' length 997444 bytes (974 Kb)
URL aperto
downloaded 974 Kb

package 'sp' successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package 'sp'

The downloaded packages are in
 > library(sp)
Errore in library(sp) : non c'è alcun pacchetto chiamato 'sp'

The error message is the same as earlier, there is no package called 
"sp", the attempt to install it again removed the old version except for 
the .dll.


More information about the R-help mailing list