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Old 9th January 2010
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IdOp IdOp is offline
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Join Date: May 2008
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Terminal type set to 'x11'
gnuplot> plot sin(x)

gnuplot: unable to open display ''
gnuplot: X11 aborted.
This is exactly the behaviour I get when running gnuplot with TERM=xterm and DISPLAY unset. So a question is: is your DISPLAY variable set (and exported) at the point of running gnuplot?
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