Explanation
The ddnames specified in the message are required
for LOGON processing. The following list of ddnames is currently required:
- SYSUADS
- This ddname describes the user attribute data
set.
- SYSLBC
- This ddname is used for access to the broadcast
data set.
System action
The system issues message IKJ56452I to the terminal
for which TSOLOGON was operating. It then disconnects the terminal
from the TSO subsystem.
Source
Time Sharing Option/Extensions (TSO/E)
Routing code
Descriptor code