How To Fix 30018 - Please maintain unit of measure in line &

SAP Error Message - Details

• Message type: E = Error

• Message class: 30 - Service Master: Basic Data

• Message number: 018

• Message text: Please maintain unit of measure in line &

What causes this issue?

To be able to enter a master record with its basic data in the
specified line, you have to enter a unit of measure for the master
record.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 30018 - Please maintain unit of measure in line & ?

  The SAP error message 30018, "Please maintain unit of measure in line &," typically occurs when a unit of measure (UoM) is not specified for a line item in a transaction, such as a purchase order, sales order, or material document. This error can prevent the completion of the transaction.
  Cause:
  
  Missing Unit of Measure: The most common cause is that the unit of measure field is left blank for one or more line items in the document.
  Incorrect Configuration: The material master may not have a defined unit of measure for the specific material being processed.
  Data Entry Error: Users may inadvertently skip entering the unit of measure during data entry.
  
  Solution:
  
  
  Check Line Item: Go to the line item that triggered the error and ensure that the unit of measure is filled in. You can do this by:
  
  Opening the relevant document (e.g., purchase order, sales order).
  Navigating to the line item in question.
  Entering the appropriate unit of measure in the designated field.
  
  
  
  Review Material Master: If the unit of measure is not available for the material:
  
  Go to the material master record (transaction code MM03).
  Check the basic data and purchasing views to ensure that the unit of measure is defined.
  If it is missing, you may need to create or update the material master record (transaction code MM02).
  
  
  
  Configuration Check: If the issue persists, it may be necessary to check the configuration settings in the SAP system:
  
  Ensure that the unit of measure settings are correctly configured in the relevant customizing settings (transaction code SPRO).
  Verify that the UoM is correctly assigned to the material type and that the conversion factors are set up properly.
  
  
  
  User Training: If this error occurs frequently, consider providing additional training to users on how to properly enter data in the system, particularly regarding the importance of specifying units of measure.
  
  
  Related Information:
  
  Unit of Measure Types: SAP allows for different types of units of measure (e.g., base unit, order unit, sales unit). Understanding these can help in correctly setting up materials.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  ME21N: Create Purchase Order
  VA01: Create Sales Order
  
  
  Documentation: Refer to SAP documentation or help files for more detailed information on handling units of measure and related configuration settings.
  
  By following these steps, you should be able to resolve the error message 30018 and ensure that the unit of measure is properly maintained in your SAP transactions.