If you install ePiX on MacOS X with the December, 2002 Apple Developer Tools, you must manually run ranlib on the compiled library:
sudo ranlib /usr/local/lib/libepix.a
Buggy versions of the conversion script ps2epsi have been distributed with recent versions of RedHat and Mandrake. The author has seen two different one-byte errors that cause elaps to fail with a sed error. If elaps generates a sed error, you have a buggy ps2epsi. Please google for the specific error message or, if you're good with regular expressions, just fix the script yourself. (In both prior instances, the problem was an unescaped special character.)