How To Fix WXP461 - Enter the base unit of measure and the conversion factor

SAP Error Message - Details

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 461

• Message text: Enter the base unit of measure and the conversion factor

Self-Explanatory Message

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• What is the cause and solution for SAP error message WXP461 - Enter the base unit of measure and the conversion factor ?

  SAP Error Message:
  
  WXP461 - Enter the base unit of measure and the conversion factor
  
  Cause:
  This warning message appears when you are trying to maintain or create material master data (typically in the Units of Measure view) and the system detects that the base unit of measure or the conversion factor between units of measure has not been entered or is incomplete.
  
  The base unit of measure is the unit in which the stock quantities of the material are managed in SAP.
  The conversion factor is required when you define additional units of measure (e.g., sales unit, purchase unit) that differ from the base unit. It tells the system how to convert quantities between these units.
  
  If either the base unit or the conversion factor is missing or inconsistent, SAP issues this warning to ensure data integrity and correct stock management.
  
  Solution:
  
  
  Enter the Base Unit of Measure:
  
  Go to the material master transaction (e.g., MM01/MM02).
  Navigate to the Basic Data 1 view.
  Ensure that the Base Unit of Measure field is filled correctly (e.g., PC for pieces, KG for kilograms).
  
  
  
  Maintain Units of Measure and Conversion Factors:
  
  In the Units of Measure view of the material master, check all additional units of measure.
  For each additional unit (e.g., sales unit, purchase unit), enter the correct conversion factor relative to the base unit.
  
  For example, if the base unit is PC and the sales unit is BOX, and 1 BOX = 10 PC, then the conversion factor should be 10.
  
  
  Make sure the conversion factor is consistent and logical.
  
  
  
  Save the Material Master:
  
  After entering the base unit and conversion factors, save the material master.
  The warning WXP461 should no longer appear.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:  
  
  MM01 (Create Material)  
  MM02 (Change Material)  
  MM03 (Display Material)
  
  
  
  SAP Tables:  
  
  MARA (General Material Data) — stores base unit of measure in field MEINS  
  MARM (Units of Measure for Material) — stores conversion factors
  
  
  
  Notes:  
  
  The base unit of measure cannot be changed once the material has stock or transactions.  
  Always ensure that conversion factors are accurate to avoid inventory discrepancies.  
  If you are integrating with other modules (SD, MM, WM), consistent units of measure are critical.
  
  
  
  
  Summary:
  WXP461 warns you to enter the base unit of measure and the conversion factor for additional units of measure in the material master. To resolve it, ensure the base unit is set and all other units have correct conversion factors relative to the base unit.
  
  If you need further assistance, please provide the transaction you are using and the material data you are trying to maintain.