Try putting the $ENV{PGPLOT_FONT} ||= 'c:\XAMPP\perl\lib\grfont.dat' in a BEGIN BLOCK before the use PGPLOT statement. 
BEGIN {$ENV{PGPLOT_FONT} ||= 'c:\XAMPP\perl\lib\grfont.dat'};
use PGPLOT;

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In reply to Re: I am trying to run a programme which is using PGPLOT.When I call it from browser I get following error message. by Anonymous Monk
in thread I am trying to run a programme which is using PGPLOT.When I call it from browser I get following error message. by bam_usic

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