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.
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