Hi, I tried using LAPACK after a couple of months and the same program will not compile. (It complains that it can not find -llapack). gcc -Wall -g -ansi -pedantic test.c -o test svd.o mat_vec.o -llapack /usr/bin/ld: cannot find -llapack collect2: ld returned 1 exit status make: *** [test] Error 1 Looking around, it appears that the following are what I have: %locate liblapack /usr/lib/liblapack.so.3 /usr/lib/liblapack.so.3.0 /usr/lib/liblapack.so.3.0.3 I actually do not know what an .so. file is, but is my issue that the path is not set? But the funny thing is that I had used the same program and the same command previously. What changed, o/w than the move from lapack-3.0.28 to 3.0.30? Did this do anything? Any suggestions as to what should be done? Many thanks and best wishes! __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com