A brief look at the pages mentioned in the module lead me to think you need three things: The GrWin driver (ftp://spdg1.sci.shizuoka.ac.jp/ pub/GrWinlib/english/contrib/ pgplot/pggw0999b-cygwin.tgz), the pgplot library (ftp://ftp.astro.caltech.edu/pub/pgplot/pgplot5.2.tar.gz), and the Perl module (http://search.cpan.org/CPAN/authors/ id/K/KG/KGB/PGPLOT-2.18.tar.gz), installed in that order. Is that what you did?

Update: no, looks like the pgplot5.2.tar.gz is not supposed to be necessary. I'm seeing the same error you are (plus a bunch more), but don't know what's the cause.

In reply to Re^3: installing pgplot on cygwin by ysth
in thread installing pgplot on cygwin by penny

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