How To Fix SDEST039 - You cannot specify logon data for logon screen prompt

SAP Error Message - Details

• Message type: E = Error

• Message class: SDEST - Messages for RFC Destinations

• Message number: 039

• Message text: You cannot specify logon data for logon screen prompt

What causes this issue?

The destination is configured to prompt the user to log on when
connecting to the system. No logon data can be saved in the destination
in this scenario.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Make sure that, if <ZH> Logon Screen for RFC Logon</> is chosen, no
logon data (user/password or trusted relationship) is specified.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDEST039 - You cannot specify logon data for logon screen prompt ?

  The SAP error message SDEST039 indicates that you cannot specify logon data for a logon screen prompt. This error typically occurs when there is an attempt to provide logon credentials (like username and password) in a context where the system expects the user to enter them manually.
  Cause:
  
  Logon Screen Prompt: The error arises when a program or script tries to automate the logon process by providing credentials in a way that is not supported by the SAP GUI or the specific transaction.
  Security Settings: SAP has security measures in place to prevent automated logon attempts, which can lead to this error.
  Incorrect Configuration: The system might be configured in a way that does not allow for automatic logon or credential passing.
  
  Solution:
  
  Manual Logon: If you encounter this error, the simplest solution is to log in manually through the SAP GUI.
  Check Script/Program: If you are using a script or program to log in, review the code to ensure it adheres to SAP's guidelines for logon automation. You may need to modify it to avoid passing credentials directly.
  Use Secure Network Connections: If you are trying to connect to SAP through a network, ensure that you are using secure connections (like SAP GUI for HTML or SAP Business Client) that support credential management.
  SAP GUI Configuration: Check the SAP GUI settings to ensure that they are configured correctly for your environment. Sometimes, settings related to logon security can affect how credentials are handled.
  Consult Documentation: Refer to SAP documentation or support resources for specific guidelines on handling logon prompts and credentials.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SDEST039 for any updates or patches that might address this issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  Security Policies: Review your organization's security policies regarding automated logons and ensure compliance with SAP's security recommendations.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.