How To Fix WRF_APC668 - Conversion was not successful, check the conversion factors

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 668

• Message text: Conversion was not successful, check the conversion factors

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_APC668 - Conversion was not successful, check the conversion factors ?

  Certainly! Here's a detailed explanation regarding the SAP error message:
  
  SAP Error Message:
  WRF_APC668 Conversion was not successful, check the conversion factors
  
  Cause:
  This error typically occurs during activities involving product costing, production orders, or material movements where unit of measure (UoM) conversions are required. The system attempts to convert quantities between different units of measure but fails because:
  
  The conversion factors between the involved units of measure are missing, incorrect, or zero.
  The units of measure involved in the transaction are not properly maintained in the system.
  There might be inconsistencies or errors in the unit of measure conversion tables.
  The system cannot find a valid conversion path between the source and target units.
  
  
  Explanation:
  SAP uses conversion factors to convert quantities from one unit of measure to another (e.g., from pieces to kilograms). If these factors are not maintained or are invalid, the system cannot perform the conversion, resulting in this error.
  
  Solution:
  
  
  Check Unit of Measure Conversion Factors:
  
  Go to transaction CUNI (Units of Measure).
  Verify that the units of measure involved in the transaction have valid conversion factors defined.
  Ensure that the conversion factor is not zero or missing.
  Maintain or correct the conversion factors as needed.
  
  
  
  Check Material Master Data:
  
  Use transaction MM03 to check the material master.
  Verify the base unit of measure and any alternative units of measure.
  Ensure that the units used in the transaction are consistent with those maintained in the material master.
  
  
  
  Check Customizing Settings:
  
  In SPRO, navigate to Logistics - General > Units of Measure > Check Units of Measure.
  Verify that the units are correctly defined and active.
  
  
  
  Check Transaction Data:
  
  Review the transaction or document causing the error.
  Confirm that the units of measure entered are valid and consistent.
  
  
  
  Recreate or Adjust Conversion Factors:
  
  If the conversion factors are missing, create them.
  If they are incorrect, adjust them to the correct values.
  
  
  
  Check for User Exits or Enhancements:
  
  Sometimes custom code may interfere with unit conversions.
  Review any user exits or BAdIs related to unit conversions or costing.
  
  
  
  
  Additional Information:
  
  This error is common in Product Costing (CO-PC), Production Orders (PP), and Inventory Management (MM-IM) scenarios.
  Always ensure that the units of measure used in BOMs, routings, and production orders are consistent and properly maintained.
  If the error occurs during a specific transaction, try to replicate it with a simpler scenario to isolate the problem.
  SAP Notes and OSS messages related to unit of measure conversions can provide additional insights.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WRF_APC668 Conversion was not successful, check the conversion factors
  
  
  Cause
  Missing or incorrect unit of measure conversion factors
  
  
  Solution
  Maintain/check conversion factors in CUNI; verify material master units; correct customizing settings
  
  
  Related Transactions
  CUNI, MM03, SPRO (Unit of Measure settings)
  
  
  Common Modules
  CO-PC, PP, MM-IM
  
  
  
  
  If you need help with specific steps or screenshots, feel free to ask!