"Fail to install the R extensions"

Question

Hello:

I am trying to install the R extensions but it is still not working.

The following error is shown when RapidMiner is trying to load the dynamic library "jri.DLL":

"The local binary library ...jri.dll could not be loaded.
Reason: Native library is already loaded in another class loader"

Any hints why this happened?

Thank you in advance,

Gladys

keith · Answer

gladysCJ  wrote:
Path: C:\Program Files\R\R-2.11.1\bin;C:\Program Files\Java\jdk1.6.0_14\jre\bin;C:\Users\Gladys Castillo\Documents\R\win-library\2.11\rJava\jri

My PATH variable the architecture version included, e.g. C:\Program Files\R\R-2.12.2\bin\i386, and I have R and RM working together successfully.

Recent builds of R have both 32 and 64 bit Windows support in one package, and sometimes it may be necessary to specify the full architecture path.  May be worth a try.

Keith

land · Answer

Hi,
how did you install the Extension and RapidMiner? It seems to me, that you might have either installed the extension twice, or there are some problems with the class loader...

Greetings,
  Sebastian

gladysCJ · Answer

Thank you Tom for the hints...
I decided to re-install the R using the version you is using (2.11.1) but the problem remains the same:

"The local binary library ...jri.dll could not be loaded.
Reason: Native library is already loaded in another class loader"

I have 32-bits Windows Vista.
My environment variables are:

R_HOME: C:\Program Files\R\R-2.11.1

JAVA_HOME: C:\Program Files\Java\jdk1.6.0_14\jre

Path: C:\Program Files\R\R-2.11.1\bin;C:\Program Files\Java\jdk1.6.0_14\jre\bin;C:\Users\Gladys Castillo\Documents\R\win-library\2.11\rJava\jri

May be someone, specialist in Java, knows what this kind of error means ?.

My r.native lib is pointed to the jri.dll in the R library
C:\Users\Gladys Castillo\Documents\R\win-library\2.11\rJava\jri

Regards