How To Fix 29804 - Previous session header record was ignored

SAP Error Message - Details

• Message type: E = Error

• Message class: 29 - Bills of Material

• Message number: 804

• Message text: Previous session header record was ignored

What causes this issue?

The sequential file contains two consecutive session header records.
For this reason, the previous session header record is ignored.

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message 29804 - Previous session header record was ignored ?

  The SAP error message "29804 Previous session header record was ignored" typically occurs in the context of data transfer processes, particularly when dealing with IDocs (Intermediate Documents) or other batch processing scenarios. This error indicates that there was an issue with the session header record, which is crucial for maintaining the integrity of the data being processed.
  Cause:
  
  Session Management Issues: The error often arises when there are inconsistencies in the session management, such as multiple sessions being opened or closed improperly.
  Data Format Issues: If the data being processed does not conform to the expected format or structure, it can lead to this error.
  IDoc Processing Errors: If there are issues with the IDoc structure or if the IDoc is not properly formatted, it can cause the session header to be ignored.
  Concurrency Issues: If multiple processes are trying to access or modify the same data simultaneously, it can lead to conflicts and this error.
  
  Solution:
  
  Check Session Management: Ensure that sessions are being opened and closed correctly. Avoid having multiple sessions that might interfere with each other.
  Validate Data: Review the data being processed to ensure it adheres to the expected format and structure. This includes checking for missing fields, incorrect data types, or any other anomalies.
  Review IDoc Configuration: If working with IDocs, check the configuration and structure of the IDocs being processed. Ensure that they are correctly formatted and that all required segments are present.
  Monitor for Concurrency Issues: If applicable, implement locking mechanisms or other strategies to prevent concurrent access issues that could lead to this error.
  Check Logs: Review the application logs for any additional error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. SAP frequently releases updates that address known issues.
  Transaction Codes: Use transaction codes like WE02 (IDoc display) or WE19 (IDoc test tool) to analyze IDocs and their statuses.
  Documentation: Refer to SAP documentation for best practices on IDoc processing and session management.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or technical team for further investigation.