How To Fix VHU01031 - The unit of measure is not allowed according to the material master

SAP Error Message - Details

• Message type: E = Error

• Message class: VHU01 - Message ID for Master Data Maintenance Packing Objects

• Message number: 031

• Message text: The unit of measure is not allowed according to the material master

Self-Explanatory Message

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• What is the cause and solution for SAP error message VHU01031 - The unit of measure is not allowed according to the material master ?

  Certainly! Here's a detailed explanation for the SAP error message VHU01031: "The unit of measure is not allowed according to the material master":
  
  Error Message:
  VHU01031
  
  The unit of measure is not allowed according to the material master
  
  Cause:
  This error occurs when you try to use a unit of measure (UoM) in a transaction that is not permitted or maintained in the material master record for the material in question.
  In SAP, each material has specific units of measure defined in its master data. These include:
  
  Base unit of measure (mandatory)
  Alternative units of measure (optional)
  Sales unit, purchasing unit, etc.
  
  If you attempt to post a transaction (goods movement, delivery, sales order, etc.) using a unit of measure that is not defined or allowed in the material master, SAP will raise this error.
  
  Typical Scenarios:
  
  Using a unit of measure in a delivery or goods movement that is not maintained in the material master.
  Entering a sales order or purchase order with a UoM not allowed for the material.
  Trying to post inventory or stock transfer with an incorrect UoM.
  
  
  Solution:
  
  
  Check the Material Master:
  
  Go to transaction MM03 (Display Material).
  Enter the material number.
  Navigate to the Basic Data 1 view to check the Base Unit of Measure.
  Check other relevant views (Sales, Purchasing, MRP) for alternative units of measure maintained.
  
  
  
  Verify the Unit of Measure Used:
  
  Confirm the unit of measure you are trying to use in your transaction.
  Ensure it matches one of the units maintained in the material master.
  
  
  
  Maintain Allowed Units of Measure:
  
  If the unit of measure you want to use is not maintained, you need to add it.
  Use transaction MM02 (Change Material).
  Add the required unit of measure in the appropriate views:
  
  Basic Data 1 for base unit.
  Sales view for sales units.
  Purchasing view for purchasing units.
  Additional Units of Measure tab for alternative units.
  
  
  Save the changes.
  
  
  
  Unit of Measure Conversion:
  
  If you add alternative units, ensure the conversion factor to the base unit is correctly maintained.
  This ensures correct quantity conversions during transactions.
  
  
  
  Re-run the Transaction:
  
  After updating the material master, retry the transaction with the correct unit of measure.
  
  
  
  
  Additional Information:
  
  Base Unit of Measure: This is the fundamental unit in which stock quantities are managed. It cannot be changed easily once stock exists.
  Alternative Units of Measure: These allow flexibility in transactions (e.g., sales in pieces, purchasing in boxes).
  Consistency: Always ensure that the unit of measure used in documents corresponds to those maintained in the material master to avoid errors.
  Customizing: In some cases, the allowed units of measure might be restricted by configuration or user exits/enhancements.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Unit of measure used is not maintained or allowed in the material master record.
  
  
  Solution
  Check and maintain the correct units of measure in the material master (MM02).
  
  
  Transaction
  MM03 (Display), MM02 (Change) for material master; then retry the original transaction.
  
  
  Notes
  Ensure correct conversion factors and consistency between UoMs.
  
  
  
  
  If you need help with specific transactions or further troubleshooting, feel free to ask!