How To Fix /SAPAPO/RET_MESSAGES645 - Line &1 exists in charact. table, is missing in the header data table

/SAPAPO/RET_MESSAGES645 - Overview

• Message type: E = Error

• Message class: /SAPAPO/RET_MESSAGES -

• Message number: 645

• Message text: Line &1 exists in charact. table, is missing in the header data table

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 /SAPAPO/RET_MESSAGES645 - Line &1 exists in charact. table, is missing in the header data table ?

  The SAP error message /SAPAPO/RET_MESSAGES645 indicates that there is a discrepancy between the characteristic data and the header data in the context of SAP Advanced Planning and Optimization (APO). Specifically, it suggests that a line exists in the characteristic table but is missing in the header data table. This can occur in various scenarios, such as during the planning process, data uploads, or when working with master data.
  
  Cause:
  
  Data Inconsistency: The most common cause of this error is a mismatch or inconsistency between the characteristic data and the header data. This can happen if the data was manually altered, if there was an error during data upload, or if there are issues with the data model.
  Missing Data: The header data may not have been properly populated or may have been deleted, while the characteristic data still references it.
  
  Configuration Issues: There may be configuration issues in the APO system that lead to