How To Fix /SAPAPO/CHECK_CUST018 - SNP tables already changed

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CHECK_CUST -

• Message number: 018

• Message text: SNP tables already changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CHECK_CUST018 - SNP tables already changed ?

  The SAP error message /SAPAPO/CHECK_CUST018 typically indicates that there is an inconsistency or a conflict in the SNP (Supply Network Planning) tables due to changes that have been made. This error often arises during planning runs or when trying to execute certain transactions in the SAP Advanced Planning and Optimization (APO) module.
  Cause:
  
  Data Inconsistency: The SNP tables may have been modified directly in the database or through a transaction that did not complete successfully, leading to inconsistencies.
  Concurrent Changes: If multiple users or processes are trying to change the same data simultaneously, it can lead to conflicts.
  Customizations: Custom developments or enhancements that interact with SNP data may inadvertently cause inconsistencies.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production), and the transport did not include all necessary objects or data, it could lead to this error.
  
  Solution:
  
  Check for Inconsistencies: Use transaction codes like /SAPAPO/TSN1 or /SAPAPO/TSN2 to check for inconsistencies in the SNP tables. You may need to run consistency checks.
  Re-run Planning: If the error occurs during a planning run, try to re-run the planning process after ensuring that no other processes are modifying the data.
  Lock Management: Ensure that no other users or processes are locking the SNP tables when you are trying to access or modify them.
  Review Custom Code: If there are custom developments, review the code to ensure it is not causing the issue. Debugging may be necessary to identify the root cause.
  Transport Management: If the issue arose after a transport, check the transport logs and ensure that all necessary objects were included and correctly imported.
  Database Consistency: In some cases, you may need to perform a database consistency check or repair, but this should be done with caution and typically under the guidance of SAP support.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to this error message for specific guidance or patches that may address the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  Always ensure that you have backups and that you are following best practices when making changes to the system or database to avoid data loss or further inconsistencies.