sh: convert: command not found

convert is probably from ImageMagick. On Windows you can use its installer, on *NIX systems I usually find it easiest to use the system's package manager, e.g. on Debian/Ubuntu sudo apt-get install imagemagick (or sudo apt-get install graphicsmagick-imagemagick-compat).

In reply to Re^3: Locating Chart::Gnuplot by haukex
in thread Locating Chart::Gnuplot by SevenDimensions

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