How To Fix D4633 - Specify an active application server

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 633

• Message text: Specify an active application server

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message D4633 - Specify an active application server ?

  The SAP error message D4633, which states "Specify an active application server," typically occurs when a user attempts to connect to an SAP system but the system cannot find an active application server to handle the request. This can happen for several reasons, including configuration issues, network problems, or server availability.
  Causes:
  
  Inactive Application Server: The specified application server is not running or is down for maintenance.
  Incorrect Configuration: The SAP GUI or the connection settings may be incorrectly configured, pointing to a non-existent or inactive server.
  Network Issues: There may be network connectivity problems preventing access to the application server.
  Load Balancer Issues: If a load balancer is used, it may not be routing requests to an active server.
  SAP System Configuration: The SAP system may not be properly configured to recognize the available application servers.
  
  Solutions:
  
  
  Check Server Status: Verify that the application server you are trying to connect to is up and running. You can do this by checking the SAP Management Console (SAP MMC) or using transaction codes like SM51 to view the list of active application servers.
  
  
  Review Connection Settings: Ensure that the SAP GUI connection settings are correct. Check the following:
  
  The system ID (SID)
  Instance number
  Hostname or IP address of the application server
  Correct client number
  
  
  
  Network Connectivity: Test the network connection to the application server. You can use tools like ping or telnet to check connectivity to the server's hostname and port.
  
  
  Load Balancer Configuration: If using a load balancer, ensure that it is correctly configured to route requests to active application servers. Check the load balancer's health checks and routing rules.
  
  
  SAP System Configuration: If you have access, check the SAP system configuration to ensure that all application servers are correctly registered and available. You can use transaction SMLG to check the logon groups and their associated servers.
  
  
  Contact System Administrator: If you are unable to resolve the issue, contact your SAP system administrator or IT support team for assistance. They may need to check server logs or perform further diagnostics.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM51 (to view active servers), SMLG (to check logon groups), and SM04 (to see user sessions).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for troubleshooting connection issues and server management.
  
  By following these steps, you should be able to identify and resolve the cause of the D4633 error message in SAP.