Starting tcltk without Tk

Philippe,

I'm not quite sure why you are asking on a Mac list, but the error  
comes from Tcl/Tk. I'd suggest asking on R-devel, the Tcl/Tk used in  
the R binary is the same for R 2.6.x and 2.7.0 so it must be a  
change in tcltk.

Cheers,
Simon


On May 4, 2008, at 7:01 AM, Philippe Grosjean wrote:

Hello,

Up to R 2.6.2, I used to start Tcl *without Tk* (I need only Tcl  
for some part of my work, like a socket server written in Tcl only,  
for instance) with this code under Mac OS X (particularly on this  
system, because I don't want to start X11 just to use Tcl code,  
which is required for Tk!):

Sys.unsetenv("DISPLAY")
library(tcltk)

I got then the message "no DISPLAY variable so Tk is not  
available", but could work with Tcl without problems.

Now, with R 2.7.0, I got the following and Tcl failed to load:
Loading Tcl/Tk interface ... Error in fun(...) : no display name  
and no $DISPLAY environment variable
Error : .onLoad failed in 'loadNamespace' for 'tcltk'
Error: package/namespace load failed for 'tcltk'

I try to locate the message "no display name and no $DISPLAY  
environment variable" in the code but I cannot find it. Could  
someone help me please?

I understand that starting Tcl without Tk from R is not an intended  
behaviour, but would it be possible to include an option to do so?

sessionInfo()

R version 2.7.0 Patched (2008-04-22 r45460)
i386-apple-darwin8.10.1

locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

Many thanks,

Philippe Grosjean
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( ( ( ( (    Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (    Numerical Ecology of Aquatic Systems
) ) ) ) )   Mons-Hainaut University, Belgium
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