Hello
Logon to the shadow instance as user DDIC in client 000 on server dev_server instance 02.
If I try to open the system from saplogon, it returns the error : "partner 'server:sapdp02' not reached"
The problem is with the SAP GUI configuration
I see a difference in the host name here - dev_server and server
Try to use the IP address instead of the hostname.
Regards
RB