[R] problems with rJava

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Jan 7 09:30:06 CET 2011

On Thu, 6 Jan 2011, karamoo wrote:

> Hi All, and Heberto,
> Did you ever resolve your installation problem with rJava?
> I have a new windows 7 machine and can't seem to get it installed correctly.
> I do have Java installed.  I download rJava without proble, then:

As you didn't follow the posting guide, we don't know if this is 32- 
or 64-bit R on 32- or 64-bit Windows.

If you are running 64-bit R you need 64-bit Java, and similarly for 
32-bit.  The message you show indicates that you do not have the 
appropriate Java installed.

As I have pointed out already this week, rJava has its own mailing 
list, so please follow up there.

>> install.packages("rJava")
> Installing package(s) into ‘C:\Users\Patrick\Documents/R/win-library/2.12’
> (as ‘lib’ is unspecified)
> trying URL
> 'http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/2.12/rJava_0.8-8.zip'
> Content type 'application/zip' length 637125 bytes (622 Kb)
> opened URL
> downloaded 622 Kb
> The downloaded packages are in
>        C:\Users\Patrick\AppData\Local\Temp\Rtmp9zcM7g\downloaded_packages
> Looks like it downloaded fine to my eyes. But in the next step I get an
> error:
>> library(rJava)
> Error in utils::readRegistry(key, "HLM", 2) :
>  Registry key 'Software\JavaSoft\Java Runtime Environment' not found
> Error in utils::readRegistry(key, "HLM", 2) :
>  Registry key 'Software\JavaSoft\Java Development Kit' not found
> Error : .onLoad failed in loadNamespace() for 'rJava', details:
>  call: fun(...)
>  error: JAVA_HOME cannot be found from the Registry
> Error: package/namespace load failed for 'rJava'
> I'm not sure how to check where R is looking for rJava vs where it lives,
> this seems to be an issue in other posts, although they have different
> errors.
> I'm a novice still at R. I see a lot of posts on this topic, but few are
> recent.  Help would be much appreciated.
> Thanks!
> Kara Moore
> Evolution and Ecology
> University of California, Davis, USA

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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