How To Fix 26187 - RFC connection to source system & is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: 26 - Dokumentenverwaltung

• Message number: 187

• Message text: RFC connection to source system & is not defined

What causes this issue?

An attempt has been made to reach the sending system via RFC. This is
necessary in case the document originals are distributed via ALE.

System Response

The system tries to create an RFC link to the sending system. This link
could not be established.

How to fix this error?

Check the RFC link to the sending system.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 26187 - RFC connection to source system & is not defined ?

  The SAP error message "26187 RFC connection to source system & is not defined" typically indicates that there is an issue with the Remote Function Call (RFC) connection configuration between the SAP system you are working in and the source system you are trying to connect to. This error can occur in various scenarios, such as when trying to execute a remote function module or when performing data transfers.
  Cause:
  
  Missing RFC Destination: The specified RFC destination (the source system) is not defined in the SAP system you are working in.
  Incorrect Configuration: The RFC destination may be incorrectly configured, leading to connection issues.
  Authorization Issues: The user may not have the necessary authorizations to access the specified RFC destination.
  Network Issues: There may be network connectivity issues preventing the connection to the source system.
  System Configuration: The source system may not be properly configured to accept RFC connections.
  
  Solution:
  
  
  Define the RFC Destination:
  
  Go to transaction code SM59 in the SAP GUI.
  Check if the RFC destination for the source system is defined. If it is not, create a new RFC destination.
  Ensure that you enter the correct connection parameters, such as the target host, system number, and client.
  
  
  
  Test the Connection:
  
  After defining the RFC destination, use the "Test Connection" feature in SM59 to verify that the connection to the source system is working correctly.
  
  
  
  Check Configuration:
  
  Ensure that the connection type (e.g., T, 3, etc.) is appropriate for your use case.
  Verify that the logon credentials (username and password) are correct and that the user has the necessary authorizations.
  
  
  
  Review Authorizations:
  
  Check the user roles and authorizations to ensure that the user has access to the RFC destination.
  
  
  
  Network Configuration:
  
  Ensure that there are no firewall or network issues preventing the connection to the source system.
  Check if the source system is up and running and can accept connections.
  
  
  
  Consult Documentation:
  
  If the issue persists, consult SAP documentation or support for further troubleshooting steps specific to your environment.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: Manage RFC destinations.
  SU01: User maintenance (to check user authorizations).
  ST22: Dump analysis (to check for any related dumps).
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to RFC connections.
  
  
  Logs: Review system logs (transaction SLG1) for any additional error messages or information that may help diagnose the issue.
  
  
  By following these steps, you should be able to resolve the RFC connection error and establish a successful connection to the source system.