On Oct 29, 2012, at 11:17 AM, Robert Baer wrote:
> When running [1] "R version 2.15.1 (2012-06-22)" "x86_64-pc-mingw32", rJava
> fails. I have installed both the 32-bit and 64-bit versions of Java 7 update
> 9.
>
> > library(rJava)
> Error : .onLoad failed in loadNamespace() for 'rJava', details:
> call: stop("No CurrentVersion entry in '", key, "'! Try re-installing Java
> and make sure R and Java have matching architectures.")
> error: object 'key' not found
> Error: package/namespace load failed for ‘rJava’
> >
>
> It appears that rJava was not seeing the x64 Java. For clarity, I installed
> the 32-bit java library second, and I imagined this might be the problem. The
> Java installer told me that it was already present, and the x64 library
> appeared to be working with the 64-bit IE9 browser
>
> Indeed, reinstalling Java x64, the rJava package iloaded fine with the
> library(rJava) command in 64-bit R. rJava could STILL be loaded with
> library(rJava) within x86 R.
>
> My question is, should the order of Java installation affect the ability of
> rJava to load under 64-bit R? Are there environmental variables or registry
> settings that should be checked in such cases or is it literally necessary to
> do a complete reinstall?
>
The registries are completely separate for 32-bit and 64-bit so installing
32-bit Java doesn't affect 64-bit R and vice-versa. rJava is simply checking
the registry that is has access to and it is the one corresponding to the R
process (so 32-bit R will check 32-bit registry and 64-bit R will check the
64-bit registry). It is looking for either of Software\JavaSoft\Java Runtime
Environment or Software\JavaSoft\Java Development Kit registry tree.
Cheers,
Simon
PS: Please uses stats-rosuda-devel mailing list for rJava questions.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
