Hi Paul,
The simplest possible difference (I have a /usr/local/lib/libpgplot.dylib file and you don't) isn't the case. The pgplot library in question should be in /Applications/Ifeffit/pgplot/libpgplot.a.
this is what I have in that directory: stefano% pwd /Applications/Ifeffit/pgplot stefano% ls -la total 2480 drwxr-xr-x 13 root admin 442 Apr 7 09:06 . drwxrwxr-x 24 root admin 816 Apr 7 09:06 .. -rw-r--r-- 1 root admin 247 Jan 3 10:48 drivers.list -rw-r--r-- 1 root admin 66020 Jan 3 10:48 grfont.dat -rw-r--r-- 1 root admin 3911 Jan 3 10:48 grpckg1.inc -rwxrwxr-x 1 root admin 613560 Jan 3 10:48 libpgplot_iff.a -rw-r--r-- 1 root admin 211532 Jan 3 10:48 libpng_iff.a -rw-r--r-- 1 root admin 82380 Jan 3 10:48 libz_iff.a -rw-r--r-- 1 root admin 35230 Jan 3 10:48 makefile -rw-r--r-- 1 root admin 162651 Jan 3 10:48 pgplot.doc -rw-r--r-- 1 root admin 6287 Jan 3 10:48 pgplot.inc -rwxr-xr-x 1 root admin 49528 Jan 3 10:48 pgxwin_server -rw-r--r-- 1 root admin 16059 Jan 3 10:48 rgb.txt It appears that I do not have any libpgplot.a in this directory HTH Stefano -- ____________________________________________ Stefano Ciurli Professor of Chemistry Laboratory of Bioinorganic Chemistry Department of Agro-Environmental Science and Technology University of Bologna Viale Giuseppe Fanin, 40 I-40127 Bologna Italy Phone: +39-051-209-6204 Fax: +39-051-209-6203 "Fatti non foste a viver come bruti, ma per seguir virtute e canoscenza" Dante Alighieri - Inferno - Canto XXVI "Ihr seid bestimmt, nicht Tieren gleich zu leben, Nein, Tugend zu erringen und Erkenntnis" "Ye were not form'd to live the life of brutes, But virtue to pursue and knowledge high"