When ending a ZMF ISPF edit session, a user sees the following type of screen:

CMNSTDWN                Serena(R) ChangeMan(R) ZMF Down              
Command ===>                                                         
                                                                     
   Unable to establish session with ChangeMan ZMF Started Task       
   for Subsystem ID "T" .                                            
                                                                     
   User disconnected from SerNet                                     
                                                                     
                                                                     
   If you have Load Balancing enabled, contact your ChangeMan ZMF    
   Administrator to have ChangeMan ZMF for Subsystem ID "T"          
   started on one Logical Partition at your installation.            
                                                                     
   If you are not using Load Balancing do one of the following:      
                                                                     
   -  Contact your ChangeMan ZMF Administrator to have ChangeMan ZMF 
      for Subsystem ID "T" started on this Logical Partition.        
   -  Select a different ChangeMan ZMF Subsystem ID (if multiple     
      subsystems are being used on this Logical Partition).          
   -  LOGON to another Logical Partition on which ChangeMan ZMF is   
      running.                                                       

The ZMF Server started task shows the following type of disconnect for the user:

2023/04/26 04:51:00.00 17734000 SER2005I CMN  Detach user USER01: TCA=25888000 TCB=008A81D0 ASID=00AA

The changes made during the edit session are not saved to the package staging dataset.

Full article: https://portal.microfocus.com/s/article/KM000016929