[BioC] qrqc with error message of "unable to start device PNG" and "unable to open connection to X11 display"?
James W. MacDonald
jmacdon at uw.edu
Wed May 30 15:22:05 CEST 2012
Hi SangChul,
On 5/29/2012 4:46 PM, Sang Chul Choi wrote:
> Hi,
>
> I am trying to use qrqc Bioc package in a linux machine used as a compute node. I have the following error:
>
> ====================
> Error in X11(paste("png::", filename, sep = ""), g$width, g$height, pointsize, :
> unable to start device PNG
> In addition: Warning message:
> In grDevices::png(..., width = width, height = height, res = dpi, :
> unable to open connection to X11 display ''
> ====================
>
> I have googled for an answer and bumped into following mailing list posts:
>
> https://stat.ethz.ch/pipermail/r-help/2008-March/155943.html
> https://stat.ethz.ch/pipermail/r-help/2008-February/155021.html
> https://stat.ethz.ch/pipermail/r-help/2008-February/155023.html
>
> It is not obvious what I should do. I will appreciate your answers.
The simple answer is to run the code on the head rather than a compute
node. In my experience, compute nodes usually don't have 'GUI-type'
software installed (X11, png, etc), as it is not common for people to
need that sort of thing.
Best,
Jim
>
> Thank you,
>
> SangChul
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--
James W. MacDonald, M.S.
Biostatistician
University of Washington
Environmental and Occupational Health Sciences
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Seattle WA 98105-6099
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