Using AIX ftp client to ftp to AIX ftp server.

Fails.

ftp> put /usr/WebSphere/scripts/WAS51jar
200 PORT command successful.
553 /usr/WebSphere/scripts/WAS51jar: No such file or directory

Works.

ftp> put WAS51jar
200 PORT command successful.
150 Opening data connection for WAS51jar.
226 Transfer complete.
1158799 bytes sent in 0.03647 seconds (3.103e+04 Kbytes/s)
local: WAS51jar remote: WAS51jar
ftp>

I have to cd to the local directory before starting ftp client.

File paths can be used on Windows and Linux ftp clients. Are there
any restrictions on AIX?