How To Fix LK026 - Receiving and transmitting systems must be entered

SAP Error Message - Details

• Message type: E = Error

• Message class: LK - WM -> SUB connection messages

• Message number: 026

• Message text: Receiving and transmitting systems must be entered

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 LK026 - Receiving and transmitting systems must be entered ?

  The SAP error message LK026 ("Receiving and transmitting systems must be entered") typically occurs in the context of Electronic Data Interchange (EDI) or when dealing with IDocs (Intermediate Documents) in SAP. This error indicates that the system requires specific information about the receiving and transmitting systems to process the data correctly.
  Cause:
  The error usually arises due to one of the following reasons:
  
  Missing Configuration: The receiving and transmitting systems have not been defined in the configuration settings for EDI/IDoc processing.
  Incomplete Master Data: The necessary master data for the partner profiles (such as logical systems) is not maintained.
  Incorrect Partner Profile: The partner profile may not be set up correctly, or the necessary parameters are missing.
  
  Solution:
  To resolve the LK026 error, you can follow these steps:
  
  
  Check Partner Profiles:
  
  Go to transaction WE20 (Partner Profiles).
  Ensure that the partner profiles for both the sending and receiving systems are correctly configured.
  Verify that the logical systems are correctly defined and that the necessary parameters (like message type, process code, etc.) are set.
  
  
  
  Define Logical Systems:
  
  Ensure that the logical systems are defined in transaction SM30 (Table View Maintenance) for the table T005 (which contains the logical system names).
  If the logical systems are not defined, you can create them.
  
  
  
  Maintain Distribution Model:
  
  Use transaction BD64 to check the distribution model.
  Ensure that the necessary entries for the logical systems are maintained.
  
  
  
  Check EDI Configuration:
  
  If you are using EDI, ensure that the necessary configurations for EDI are in place, including the correct settings for the communication method (e.g., FTP, HTTP, etc.).
  
  
  
  Review IDoc Settings:
  
  If the error occurs during IDoc processing, check the IDoc type and ensure that the necessary segments are populated correctly.
  
  
  
  Testing:
  
  After making the necessary changes, test the process again to see if the error persists.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  WE20: Partner Profiles
  BD64: Distribution Model
  SM30: Table Maintenance
  WE02: IDoc Display
  WE19: IDoc Test Tool
  
  
  
  Documentation: Refer to SAP Help documentation for EDI and IDoc processing for more detailed information on configuration and troubleshooting.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  
  By following these steps, you should be able to resolve the LK026 error and ensure that the receiving and transmitting systems are correctly configured in your SAP environment.