pkg_add question

[Hamilton]

Hi,
    I would like to install gnuls-4.0_1.tgz into my system. When I =
install by using the command=20
    "#pkg_add gnuls-4.0_1.tgz", the system echos "Bus error (core =
dumped)".
    What does the message mean? How do I install the gnuls package?

    thanks very much.