How To Fix WS295 - Enter a unit of measure

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 295

• Message text: Enter a unit of measure

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS295 - Enter a unit of measure ?

  SAP Error Message:
  
  WS295 - Enter a unit of measure
  
  Cause:
  The error message WS295 occurs when a required Unit of Measure (UoM) field is left empty or not entered in a transaction or master data maintenance screen. SAP expects a valid unit of measure to process the data correctly, and if it is missing, the system prompts with this error.
  This typically happens in scenarios such as:
  
  Creating or changing material master data where the base unit of measure or other UoM fields are mandatory.
  Entering quantities in sales orders, purchase orders, or production orders without specifying the unit of measure.
  During goods movements or inventory postings where the system requires a UoM to calculate quantities.
  
  
  Solution:
  
  
  Enter a valid Unit of Measure:
  
  Make sure to input a valid unit of measure in the required field. The UoM must be defined in the SAP system (transaction CUNI or SPRO ? Logistics ? General ? Units of Measure ? Define Units of Measure).
  
  
  Check the field for mandatory input:
  
  Verify that the UoM field is not left blank. If you are using a custom screen or transaction, ensure that the UoM field is correctly mapped and mandatory.
  
  
  Verify material master data:
  
  If the error occurs during material master maintenance, check that the base unit of measure is maintained correctly in the material master (transaction MM02 or MM01).
  
  
  Check configuration:
  
  If the error appears unexpectedly, check the configuration for units of measure and related settings in IMG (transaction SPRO).
  
  
  User input validation:
  
  Train users to always enter the unit of measure when required, especially in transactions involving quantities.
  
  
  
  Related Information:
  
  
  Transaction Codes:  
  
  MM01/MM02 – Create/Change Material Master  
  CUNI – Units of Measure  
  VA01/VA02 – Create/Change Sales Order  
  MB1A/MB1B/MB1C – Goods Movements  
  SPRO – Customizing for Units of Measure
  
  
  
  SAP Notes:
  
  Check SAP Notes related to units of measure if the problem persists or if there are inconsistencies in UoM handling.
  
  
  Unit of Measure in SAP:
  
  Units of measure are critical for quantity management in SAP. They define how quantities are measured and converted across different processes.
  
  
  
  Summary:
  
  Cause: Missing or empty unit of measure field where it is mandatory.  
  Solution: Enter a valid unit of measure in the required field.  
  Check: Material master data, transaction input, and configuration for units of measure.
  
  If you provide the exact transaction or context where the error occurs, I can help with more specific guidance.