How To Fix SDEST186 - Obligatory parameter "LOGON_USER" must not be empty

SAP Error Message - Details

• Message type: E = Error

• Message class: SDEST - Messages for RFC Destinations

• Message number: 186

• Message text: Obligatory parameter "LOGON_USER" must not be empty

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDEST186 - Obligatory parameter "LOGON_USER" must not be empty ?

  The SAP error message SDEST186 indicates that the obligatory parameter "LOGON_USER" must not be empty. This error typically occurs in scenarios where a user is trying to execute a function or transaction that requires a user logon but the system does not have the necessary user information.
  Cause:
  
  Missing User Information: The most common cause of this error is that the system is attempting to execute a process that requires a user logon, but the user information has not been provided or is missing.
  Configuration Issues: There may be issues in the configuration of the system or the specific transaction that is being executed, leading to the absence of the required user parameter.
  Programmatic Errors: If the error occurs in a custom program or report, it may be due to a coding error where the user logon information is not being passed correctly.
  
  Solution:
  
  Check User Logon: Ensure that the user is logged into the SAP system properly. If the user is not logged in, log in with valid credentials.
  Review Transaction/Function Call: If you are executing a specific transaction or function, check the parameters being passed to ensure that the LOGON_USER parameter is being populated correctly.
  Debugging: If this error occurs in a custom program, use the debugger to trace the execution and check where the LOGON_USER parameter is being set. Ensure that it is being assigned a valid user value.
  Configuration Review: If the error persists, review the configuration settings related to the transaction or function module to ensure that all required parameters are correctly set up.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: Depending on the context of the error, you may want to check transaction codes related to user management, such as SU01 (User Maintenance) or SU10 (Mass User Maintenance).
  Authorization Issues: Sometimes, authorization issues can lead to unexpected behavior. Ensure that the user has the necessary authorizations to perform the action that is causing the error.
  SAP Community: Consider searching or posting in the SAP Community forums for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.