How To Fix W/169 - Enter a valid logon/server group

SAP Error Message - Details

• Message type: E = Error

• Message class: W/ -

• Message number: 169

• Message text: Enter a valid logon/server group

Self-Explanatory Message

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• What is the cause and solution for SAP error message W/169 - Enter a valid logon/server group ?

  SAP Error Message:
  
  W/169 Enter a valid logon/server group
  
  Cause:
  This warning message appears when the SAP GUI client tries to connect to an SAP system but the Logon Group or Server Group specified in the connection settings is invalid or does not exist on the SAP Message Server.
  
  The Logon Group is used in load balancing scenarios where multiple application servers are grouped together.
  If the Logon Group name entered in the SAP GUI connection properties does not match any group defined on the Message Server, the system cannot route the user to an appropriate application server.
  
  
  Explanation:
  
  SAP systems with multiple application servers often use Message Server and Logon Groups to distribute user load.
  The SAP GUI connection can be configured to connect via a Message Server and specify a Logon Group.
  If the Logon Group is incorrect, misspelled, or not configured on the Message Server, the system will throw this warning.
  
  
  Solution:
  
  
  Verify Logon Group Name:
  
  Check the Logon Group name configured in the SAP GUI connection properties.
  Make sure it exactly matches the Logon Group name defined on the SAP Message Server (case-sensitive).
  
  
  
  Check Message Server Configuration:
  
  On the SAP system, use transaction SMMS (Message Server Monitor) or check the profile parameters to see the list of available logon groups.
  Alternatively, check the instance profile parameters:
  
  rdisp/mshost (Message Server host)
  rdisp/msserv (Message Server service/port)
  rdisp/server_logon_group (Logon Group names)
  
  
  
  
  
  Correct the SAP GUI Connection:
  
  Open SAP Logon.
  Edit the connection entry.
  Under the Connection Type, if using Message Server, ensure the Logon Group field is correctly filled.
  If unsure, try removing the Logon Group to connect directly to a specific application server.
  
  
  
  If No Load Balancing is Needed:
  
  Instead of using Message Server and Logon Group, configure the SAP GUI connection to connect directly to a specific application server (using Application Server connection type).
  
  
  
  Check Network and DNS:
  
  Ensure the Message Server hostname and port are reachable from the client machine.
  
  
  
  
  Additional Information:
  
  This is a warning (W/169), so sometimes the system may still allow connection if a direct server is specified or fallback occurs.
  Proper configuration of Logon Groups is essential in large SAP landscapes for load balancing and high availability.
  For more details, SAP Note or documentation on Load Balancing and Message Server can be referred.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Invalid or non-existent Logon Group specified in SAP GUI connection for Message Server.
  
  
  Solution
  Verify and correct Logon Group name in SAP GUI; check Message Server configuration.
  
  
  Related Info
  Use transaction SMMS to view logon groups; check instance profiles for group definitions.
  
  
  
  
  If you need help checking the logon groups on the SAP system, you can run:
  sapcontrol -nr <instance_number> -function GetProcessList
  or use SAP GUI transaction SMMS to view the Message Server and logon groups.
  
  Let me know if you want detailed steps on how to check or change the SAP GUI connection settings!