How To Fix L6027 - The first record of a communication document is not marked with F or S

SAP Error Message - Details

• Message type: E = Error

• Message class: L6 - LVS Link R/2 - ECC

• Message number: 027

• Message text: The first record of a communication document is not marked with F or S

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message L6027 - The first record of a communication document is not marked with F or S ?

  The SAP error message L6027, "The first record of a communication document is not marked with F or S," typically occurs in the context of logistics and communication documents, particularly when dealing with inbound or outbound deliveries, or when processing communication documents in the SAP system.
  Cause:
  This error usually indicates that the first record of a communication document (such as an IDoc or a similar document) is not properly marked with the expected identifiers. In SAP, communication documents often have specific markers to indicate their status or type:
  
  F: Indicates a "Function" or a specific type of processing.
  S: Indicates a "Status" or another type of processing.
  
  If the first record does not have either of these markers, the system cannot process the document correctly, leading to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Document Structure: Review the structure of the communication document to ensure that the first record is correctly marked with either 'F' or 'S'. This may involve checking the IDoc or the data being sent to ensure it adheres to the expected format.
  
  
  Review the Data Mapping: If you are using middleware or a custom program to generate the communication document, ensure that the mapping logic correctly assigns the 'F' or 'S' markers to the first record.
  
  
  Debugging: If you have access to debugging tools, you can trace the process that generates the communication document to identify where the marker is being omitted.
  
  
  Consult Documentation: Refer to SAP documentation or help resources related to the specific type of communication document you are working with. This can provide insights into the expected structure and any specific requirements.
  
  
  Check for Updates or Notes: Sometimes, SAP releases notes or patches that address specific issues. Check the SAP Support Portal for any relevant notes related to this error message.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may have additional insights or solutions based on your specific configuration and version of SAP.
  
  
  Related Information:
  
  IDoc Processing: If you are dealing with IDocs, familiarize yourself with the IDoc structure and the specific segments that are required for successful processing.
  Transaction Codes: You may want to use transaction codes like WE02 or WE19 to monitor and test IDocs.
  Error Logs: Check the application logs (transaction SLG1) for more detailed error messages that may provide additional context for the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the L6027 error in your SAP system.