[R-SIG-Mac] rJava problem in Mac OS Sierra 10.12.5

[David Winsemius]

> On Jul 19, 2017, at 8:34 AM, Manuel Spínola <mspinola10 at gmail.com> wrote:
> 
> Dear list members,
> 
> I have problem loading some packages because rJava cannot be loaded.  I
> have the latest version of java, R and rJava.
> 
>> library(glmulti)
> Unable to find any JVMs matching version "(null)".
> No Java runtime present, try --request to install.
> running command '/usr/libexec/java_home' had status 1Error: package ‘rJava’
> could not be loaded
> 
> What I need to do to load the packages that depend on rJava?

I don't think you have provided enough information to know what to advise, but you might try looking through the r-sig-mac archives using one of the search engines:

http://markmail.org/search/?q=+list%3Aorg.r-project.r-sig-mac+No+Java+runtime+present%2C+try+--request+to+install

... although I found no questions reporting that exact error message, or you can use the StackOverflow search facilities:

https://stackoverflow.com/search?q=%5Br%5D+osx+rjava+install

People generally do have a Java runtime engine installed somewhere. Here's what I see at a Terminal session:

dw-mac-pro:~ davidwinsemius$ which java
/usr/bin/java


dw-mac-pro:~ davidwinsemius$ java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

rJava says it only requires a much older version:

SystemRequirements: Java JDK 1.2 or higher (for JRI/REngine JDK 1.4 or
        higher), GNU make

I think some packages do require the more recent Java runtime package, though.

Most people are running Yosemite or higher so the SO answer to this question may be helpful:

http://stackoverflow.com/questions/30738974/rjava-load-error-in-rstudio-r-after-upgrading-to-osx-yosemite

> 
> -- 
> *Manuel Spínola, Ph.D.*
> Instituto Internacional en Conservación y Manejo de Vida Silvestre
> 

> 
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Your question will have a better chance of coming through correctly if you use palin text for R mailing list submissions.

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David Winsemius
Alameda, CA, USA