How To Fix SDEST023 - Connection type & is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: SDEST - Messages for RFC Destinations

• Message number: 023

• Message text: Connection type & is unknown

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDEST023 - Connection type & is unknown ?

  The SAP error message SDEST023 indicates that there is an issue with the connection type specified in the system. This error typically arises when the system is trying to establish a connection using a type that is not recognized or is incorrectly configured.
  Cause:
  
  Incorrect Connection Type: The connection type specified in the configuration is not valid or is misspelled.
  Missing Configuration: The connection type may not be defined in the system settings.
  Transport Layer Issues: If the error occurs during transport activities, it may indicate issues with the transport layer configuration.
  Network Issues: There may be underlying network issues that prevent the connection from being established.
  
  Solution:
  
  
  Check Connection Type:
  
  Go to the relevant configuration settings in SAP (e.g., transaction SM59 for RFC connections).
  Verify that the connection type specified is valid and correctly spelled.
  
  
  
  Define Connection Type:
  
  If the connection type is missing, you may need to define it in the system. This can involve creating a new connection type or modifying an existing one.
  
  
  
  Review Transport Configuration:
  
  If the error occurs during transport activities, check the transport configuration settings in transaction STMS.
  Ensure that the transport routes and layers are correctly set up.
  
  
  
  Network Configuration:
  
  Check network settings to ensure that there are no firewalls or network policies blocking the connection.
  Test the network connectivity to the target system.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific connection type you are trying to use for additional guidance.
  
  
  
  SAP Support:
  
  If the issue persists, consider reaching out to SAP support for further assistance, especially if it involves complex configurations or custom setups.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  STMS - Transport Management System
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to connection types.
  Logs: Check system logs (transaction SM21) for any additional error messages that may provide more context about the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the SDEST023 error in your SAP system.