Connection terminated by the server after user enters user ID

The system console might display one of the following nonzero exit codes from the FTP server address space:

0012

This exit code indicates a socket error. See the syslogd messages for the specific error.

0024

This exit code indicates that the system was unable to load the server load module /usr/sbin/ftpdns. Ensure that the symbolic link or links for ftpdns are correct, that ftpdns exists in the z/OS® UNIX file system and that the sticky bit is on, and that FTPDNS exists in the search order.