How To Fix MM104 - Material has no base unit of measure

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 104

• Message text: Material has no base unit of measure

What causes this issue?

You want to convert quantities of a material to which no base unit of
measure has been assigned.

System Response

Conversion is not possible.

How to fix this error?

If you wish to convert quantities of a specific material, you must
assign a base unit of measure to it.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM104 - Material has no base unit of measure ?

  The SAP error message MM104: Material has no base unit of measure typically occurs when you are trying to perform an operation related to a material that does not have a defined base unit of measure in the material master record. The base unit of measure is essential for various transactions in SAP, including inventory management, purchasing, and sales.
  Cause:
  
  Missing Base Unit of Measure: The most common cause of this error is that the material master record for the specific material does not have a base unit of measure defined.
  Incorrect Material Type: The material type may not be set up correctly, or the material may not be configured to allow for a base unit of measure.
  Data Corruption: In rare cases, data corruption or incomplete data entry during the creation of the material master can lead to this issue.
  
  Solution:
  To resolve the MM104 error, follow these steps:
  
  
  Check Material Master Record:
  
  Go to transaction code MM03 (Display Material) or MM02 (Change Material).
  Enter the material number and check the Basic Data view.
  Ensure that the Base Unit of Measure field is filled in. If it is empty, you will need to enter a valid unit of measure (e.g., EA for each, KG for kilograms, etc.).
  
  
  
  Maintain Base Unit of Measure:
  
  If the base unit of measure is missing, you can add it by using transaction code MM02.
  Navigate to the Basic Data view and enter the appropriate base unit of measure.
  
  
  
  Check Material Type Configuration:
  
  Ensure that the material type allows for a base unit of measure. You may need to consult with your SAP configuration team if you suspect that the material type settings are incorrect.
  
  
  
  Data Consistency Check:
  
  If you suspect data corruption, you may need to run consistency checks or consult with your SAP Basis team to ensure that the database is functioning correctly.
  
  
  
  User Authorization:
  
  Ensure that you have the necessary authorizations to change the material master data. If not, contact your SAP administrator.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  MMBE: Stock Overview
  MB1A: Goods Withdrawal
  MB1B: Transfer Posting
  
  
  
  Unit of Measure (UoM): The base unit of measure is the primary unit in which the material is managed in the system. It is crucial for inventory valuation and reporting.
  
  
  Material Master Views: The material master has various views (Basic Data, Purchasing, Sales, etc.), and the base unit of measure is typically found in the Basic Data view.
  
  
  By following these steps, you should be able to resolve the MM104 error and ensure that your material master records are correctly configured.