If the program is sshd2, run the following:

>extattr +p /opt/tectia/sbin/sshd2

If the program is CEE.SCEERUN2, see Preparing the System.

If the program is sshg3, the reason may be that the sshg3 client does not work if su is used before establishing the Secure Shell connection. The error output depends on the terminal used and what kind of an su is made before the sshg3 connection attempt. sshg3 does not need to be program-controlled, instead avoid using su before starting sshg3.