Hi Gary, I think there is a typo as shown in the diff below diff -u package.lisp~ package.lisp --- package.lisp~ 2009-01-31 16:42:33.000000000 +0000 +++ package.lisp 2009-09-15 12:44:32.000000000 +0100 @@ -29,7 +29,7 @@ #:*plot-default-host* #:*plot-default-directory* - #:*plot-ps2pdf-directory* + #:*plot-ps2pdf-command* #:*gnuplot-home*) #+ccl (:export #:open-plot-in-window)) Diff finished. Tue Sep 15 12:44:34 2009 Best wishes, Leo