library(xlsx) fails with an error: Error: package ‘rJava’ could not be loaded

Sun, Apr 19, 2015 3:02 AM

Hi John,

Am 18.04.2015 um 22:07 schrieb John Sorkin:

Windows 7 64-bit
R 3.1.3
RStudio 0.98.1103


I am having difficulty loading and installing the xlsx package. The
loading occurred without any problem, however the library command
library(xlsx) produced an error related to rJava. I tried to install
rJava seperately, re-loaded the xlsx package, and entered the
library(xlsx) command but received the same error message about rJave.
Please see terminal messages below. Any suggestion that would allow me
to load and run xlsx would be appreciated.
Thank you,
John

install.packages("xlsx")

Installing package into ?C:/Users/John/Documents/R/win-library/3.1?
(as ?lib? is unspecified)
trying URL
'http://cran.rstudio.com/bin/windows/contrib/3.1/xlsx_0.5.7.zip'
Content type 'application/zip' length 400944 bytes (391 KB)
opened URL
downloaded 391 KB


package ?xlsx? successfully unpacked and MD5 sums checked


The downloaded binary packages are in
	C:\Users\John\AppData\Local\Temp\Rtmp4CO5m7\downloaded_packages

library(xlsx)

Loading required package: rJava
Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object
'C:/Users/John/Documents/R/win-library/3.1/rJava/libs/x64/rJava.dll':
  LoadLibrary failure:  The specified module could not be found.


Error: package ?rJava? could not be loaded

install.packages("rJava")

Installing package into ?C:/Users/John/Documents/R/win-library/3.1?
(as ?lib? is unspecified)
trying URL
'http://cran.rstudio.com/bin/windows/contrib/3.1/rJava_0.9-6.zip'
Content type 'application/zip' length 759396 bytes (741 KB)
opened URL
downloaded 741 KB


package ?rJava? successfully unpacked and MD5 sums checked


The downloaded binary packages are in
	C:\Users\John\AppData\Local\Temp\Rtmp4CO5m7\downloaded_packages

library(rJava)

Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object
'C:/Users/John/Documents/R/win-library/3.1/rJava/libs/x64/rJava.dll':
  LoadLibrary failure:  The specified module could not be found.


Error: package or namespace load failed for ?rJava?

library(xlsx)

Loading required package: rJava
Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object
'C:/Users/John/Documents/R/win-library/3.1/rJava/libs/x64/rJava.dll':
  LoadLibrary failure:  The specified module could not be found.


Error: package ?rJava? could not be loaded

There are several possibilities, why your rJava does not find rJava.dll.
A good start give [1] to [3].

Did you have the right installation of JAVA itself?

I think, in your case, the JAVA installation itself should be the 64bit
version, and probably better version 1.8 than 1.7 [3] (someone please
correct me, if I am wrong here).

You get some hints about parameters with
R CMD javareconf --help

HTH.
Regards,
Rainer Hurling


[1]
http://cran.at.r-project.org/doc/manuals/r-release/R-admin.html#Java-support
[2]
http://cran.at.r-project.org/bin/windows/base/rw-FAQ.html#Loading-a-package-fails_002e
[3]
http://stackoverflow.com/questions/7019912/using-the-rjava-package-on-win7-64-bit-with-r

library(xlsx) fails with an error: Error: package ‘rJava’ could not be loaded

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