What is "incompatible protocol version"

have installed a Network Management System at HP and when I tried to connect to Sun for Extractor function, it shows" incompatible protocol version:3". What does it mean? How to slove the problem?

Thanks a lot, Emily

Please read our rules and note:
(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post where your goal is to get an answer more quickly.

Also the forum "Post Here to Contact Site Administrators and Moderators" is intended for people who are having trouble with the site. Don't post unix questions there. I will close the duplicate thread you opened in that forum.