Andre, my guess is that there's an attempt made to connect to the
(non-existant) X server. You can disable this by forcing a backend that
doesn't need the X server. Try
import matplotlib
matplotlib.use('Agg')
before the rest of your script.
Andre Wong wrote:
> Hi
>
> I am attempting to generate graphs using matplotlib/pyplot via a cron
> process. These scripts work perfectly fine when I am logged in and run
> the scripts on the command line, however they fail to run when they are
> set up as a cronjob. Even a simplified plotting routine does not work:
>
> from matplotlib.pylab import plot
> from matplotlib.pylab import savefig
>
> plot([1,2,3,4])
> savefig('test.png')
>
> my crontab is configured like this:
>
> SHELL= /bin/tcsh
> 45 8 * * * cd [path to script]; python graphtest.py
>
>
> Thanks in advance,
>
>
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