[R] can't load rJava in R 2.8.1 on Windows XP

[drflxms]

Dear Mr. Murdoch, Dear Mr. Ripley, Dear Mr. Wang,

thank you very much for your quick and efficient help! It is exactly as
Duncan explained it: Including jvm.dll in PATH solved the problem
immediately. Everything works fine now.

The only thing is, that I do not understand why I had to do this
manualy, as I installed Java Runtime Environment a long time ago,
updated frequently and never encountered any difficulties in using Java
software.

Anyway, I am happy now :-)
Thanx again for your great support!
Greetings from Munich, Germany,

Felix

Duncan Murdoch schrieb:
> On 1/23/2009 7:38 AM, drflxms wrote:
>> Dear community,
>>
>> unfortunately I did not manage load the rJava package receiving the
>> following
>> error-message:
>>
>>
>>> library("rJava")
>> Error in inDL(x, as.logical(local), as.logical(now), ...) : kann
>> shared library 'C:/Programme/R/2.8.1/library/rJava/libs/rJava.dll' nicht
>> laden:
>> LoadLibrary failure:  Das angegebene Modul wurde nicht gefunden.
>>
>> Error : .onLoad in 'loadNamespace' für 'rJava' fehlgeschlagen
>> Fehler: Laden von Paket/Namensraum für 'rJava' fehlgeschlagen
>>
>>
>> Translation: can't load library ... rJava.dll
>> LoadLibrary failure: the module was not found
>
> That message comes from Windows, not R, and it's misleading.  It does
> not say that rJava.dll was not found, it says that a DLL needed by it
> is not found.  It would be helpful if it told you which one.  You
> should complain to Microsoft about it.  If rJava.dll had been missing,
> the English message would have been
>
>   shared library 'rJava' not found
>
> The pedump utility (in the Rtools set, see
> www.murdoch-sutherland.com/Rtools) can tell you what the dependencies
> are:
>
> pedump -i rJava.dll
>
> shows that it imports things from these dlls:
>
>  R.dll
>  KERNEL32.dll
>  msvcrt.dll
>  jvm.dll
>
> The first 3 are routine; without those R wouldn't work. (Without
> KERNEL32.dll, nothing in Windows would work.)  So as Brian said, it's
> likely jvm.dll that it can't find, or possibly a DLL that it depends on.
> Did you install Java first, as rJava requires?
>
> Duncan Murdoch
>
>>
>> Reinstalling the package did not help, installing the latest
>> developement
>> version didn't help as well.
>>
>> The shared library rJava.dll is in place (exactly where R is looking
>> for it)!
>>
>> Are there any ideas, what's wrong.
>> I'd appreciate any kind of help very much, as I need rJava urgently
>> to use RWeka and iPlots.
>>
>> Best regards,
>> Felix
>>
>> ______________________________________________
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>> 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.
>