> You need to tell us a bit more. What did you do to compile the > JAMA-Matrix jarfile? I downloaded the source (should I try the jarfile?), and compiled it as listed in the "P.S.": /tmp $ tar xvzf Jama-1.0.1.tar.gz [...] :/tmp/Jama $ gcj -c *.java :/tmp/Jama/util $ gcj -c Maths.java :/tmp/Jama $ ar r libMatrix.a `find . -name \*.o` Cheers, Andreas