How To Fix MW518 - Calculated order date &1 for &2 &3 is earlier than current order date &4

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 518

• Message text: Calculated order date &1 for &2 &3 is earlier than current order date &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MW518 - Calculated order date &1 for &2 &3 is earlier than current order date &4 ?

  The SAP error message MW518 indicates that there is a discrepancy between the calculated order date and the current order date for a specific order item. This typically occurs in the context of materials management or production planning when the system attempts to determine a delivery or production date that is earlier than the current date, which is not permissible.
  Cause:
  
  Date Calculation Issues: The system may be calculating a delivery or production date based on lead times, availability, or other parameters that result in a date earlier than the current date.
  Incorrect Master Data: The material master or vendor master data may have incorrect lead times or delivery dates configured.
  Planning Parameters: The planning parameters set in the system (like safety stock, reorder points, etc.) may lead to unrealistic date calculations.
  Order Modifications: Changes made to the order or its components (like rescheduling) may inadvertently lead to this error.
  
  Solution:
  
  Check Order Dates: Review the order and its components to ensure that the dates are set correctly. Make sure that the current order date is accurate.
  Review Master Data: Check the material master and vendor master data for any incorrect lead times or delivery dates. Update them if necessary.
  Adjust Planning Parameters: If the issue is related to planning parameters, consider adjusting them to ensure that calculated dates remain realistic.
  Recalculate Dates: If the order has been modified, try to recalculate the dates by using the appropriate transaction codes (like MD04 for stock/requirements list) or functions in the system.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and its context.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like ME21N (Create Purchase Order), ME22N (Change Purchase Order), or MD04 (Stock/Requirements List) to investigate and resolve the issue.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Exits or BAdIs: If custom logic is implemented in your SAP system, check for any user exits or BAdIs that might affect date calculations.
  
  If the problem persists after checking these areas, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in materials management or production planning.