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

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ma per seguir virtute e canoscenza"
Dante Alighieri - Inferno - Canto XXVI

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Nein, Tugend zu erringen und Erkenntnis"
"Ye were not form'd to live the life of brutes,
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