How To Fix C+451 - Incorrect assignment of cost estimate number to the material key

SAP Error Message - Details

• Message type: E = Error

• Message class: C+ -

• Message number: 451

• Message text: Incorrect assignment of cost estimate number to the material key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message C+451 - Incorrect assignment of cost estimate number to the material key ?

  The SAP error message C+451 "Incorrect assignment of cost estimate number to the material key" typically occurs in the context of cost accounting and material management within the SAP system. This error indicates that there is a mismatch or inconsistency between the cost estimate number and the material key in the system.
  Causes:
  
  Incorrect Cost Estimate Assignment: The cost estimate number may not be correctly assigned to the material in the system.
  Material Master Data Issues: The material master data may not be properly maintained, leading to discrepancies.
  Costing Variant Issues: The costing variant used may not be compatible with the material or the cost estimate.
  Inactive or Deleted Cost Estimates: The cost estimate number may refer to an inactive or deleted cost estimate.
  Data Consistency Issues: There may be inconsistencies in the database that need to be resolved.
  
  Solutions:
  
  
  Check Cost Estimate Assignment:
  
  Verify that the cost estimate number is correctly assigned to the material in the material master record.
  Use transaction code MM03 to view the material master and check the costing data.
  
  
  
  Review Material Master Data:
  
  Ensure that all relevant fields in the material master are filled out correctly, especially those related to costing.
  If necessary, update the material master data using transaction code MM02.
  
  
  
  Validate Costing Variant:
  
  Check the costing variant settings to ensure they are appropriate for the material in question.
  Use transaction code OKKN to review and adjust costing variants if needed.
  
  
  
  Check Cost Estimate Status:
  
  Use transaction code CK13N to check the status of the cost estimate. Ensure that it is active and valid for the material.
  If the cost estimate is inactive, you may need to create a new cost estimate.
  
  
  
  Data Consistency Check:
  
  Run consistency checks in the system to identify and resolve any data inconsistencies.
  You can use transaction code CKMLCP for this purpose.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files for additional guidance on cost estimates and material management.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM03: Display Material Master
  MM02: Change Material Master
  CK13N: Display Cost Estimate
  CKMLCP: Consistency Check for Material Ledger
  OKKN: Maintain Costing Variants
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for relevant notes in the SAP Support Portal.
  
  
  User Authorization: Ensure that you have the necessary authorizations to view and modify material master data and cost estimates.
  
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in SAP Controlling (CO) and Material Management (MM).