[R-SIG-Mac] Java error loading deducer

Simon Urbanek simon.urbanek at r-project.org
Thu Oct 20 17:19:34 CEST 2011


you have to load Deducer from JGR, you can't load it in a "regular" R session. Download the JGR launcher from the JGR website:
for Mac OS X 10.6 or higher:
for Mac OS X 10.5:

and then double-click on the JGR icon to start it (typically you can copy it to Applications first, but it's not mandated).


PS: you can use stats-rosuda-devel mailing list for questions about JGR, Deducer etc.

On Oct 20, 2011, at 9:49 AM, Federico Calboli wrote:

> Hi All,
> I would like to try the library 'Deducer' (http://www.deducer.org/pmwiki/pmwiki.php?n=Main.DeducerManual), because I have to introduce my other half to R. I installed JGR and Deducer and all the required libraries, but I get a java error:
> [using the R64 Mac GUI]
>> library(Deducer)
> Loading required package: rJava
> Loading required package: ggplot2
> Loading required package: reshape
> Loading required package: plyr
> Attaching package: 'reshape'
> The following object(s) are masked from 'package:plyr':
>    rename, round_any
> Loading required package: grid
> Loading required package: proto
> Loading required package: JGR
> Loading required package: JavaGD
> Loading required package: iplots
> Note: On Mac OS X we strongly recommend using iplots from within JGR.
> Proceed at your own risk as iplots cannot resolve potential ev.loop deadlocks.
> 'Yes' is assumed for all dialogs as they cannot be shown without a deadlock,
> also ievent.wait() is disabled.
> Error : .onLoad failed in loadNamespace() for 'iplots', details:
>  call: .jnew("org/rosuda/iplots/Framework")
>  error: java.lang.InternalError: Can't start the AWT because Java was started on the first thread.  Make sure StartOnFirstThread is not specified in your application's Info.plist or on the command line
> Error: package 'iplots' could not be loaded
> I am using R version 2.13.2 (2011-09-30), on an intel Mac running OS 10.7.2.
> I am not clear which Info.plist I should look at, and I would welcome any suggestion.
> Cheers
> Federico
> --
> Federico C. F. Calboli
> Neuroepidemiology and Ageing Research
> Imperial College, St. Mary's Campus
> Norfolk Place, London W2 1PG
> Tel +44 (0)20 75941602   Fax +44 (0)20 75943193
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
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