How To Fix PU478 - &1 of &2 read rows were modified in this package

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 478

• Message text: &1 of &2 read rows were modified in this package

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PU478 - &1 of &2 read rows were modified in this package ?

  The SAP error message PU478 indicates that a certain number of rows were modified in a package during a database operation, which can lead to inconsistencies or issues when trying to process the data. This error typically occurs in the context of database updates or when working with internal tables in ABAP programs.
  Cause:
  The error message PU478 occurs when:
  
  A database operation (like an update or delete) is attempted on a set of rows that have been modified since they were read into the program. This can happen if:
  
  Another transaction has modified the same rows after they were read.
  There are concurrent updates happening in the database that affect the same data set.
  
  
  
  Solution:
  To resolve the PU478 error, consider the following steps:
  
  
  Check for Concurrent Updates: Ensure that no other processes or users are modifying the same data while your program is trying to update it. You may need to implement locking mechanisms to prevent this.
  
  
  Re-read Data: Before performing the update, re-read the data from the database to ensure you have the most current version of the rows. This can be done by executing a SELECT statement again before the update.
  
  
  Handle Exceptions: Implement error handling in your ABAP code to manage situations where the data has changed. You can catch the error and decide whether to retry the operation or log the issue.
  
  
  Use Proper Transaction Management: Ensure that your database transactions are properly managed. Use COMMIT and ROLLBACK statements appropriately to maintain data integrity.
  
  
  Review Code Logic: Check the logic of your ABAP program to ensure that it is not inadvertently modifying data in a way that leads to this error.
  
  
  Database Locking: If applicable, consider using database locking mechanisms (like SELECT FOR UPDATE) to lock the rows you intend to modify, preventing other transactions from changing them until your transaction is complete.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. SAP frequently releases notes that address known issues.
  Transaction Codes: Familiarize yourself with transaction codes like SE80 (Object Navigator) or SE38 (ABAP Editor) to debug and analyze your ABAP programs.
  Performance Considerations: Be aware that excessive locking or re-reading of data can impact performance, so balance the need for data integrity with system performance.
  
  By following these steps, you should be able to address the PU478 error effectively. If the problem persists, consider reaching out to SAP support for further assistance.