How To Fix MK026 - No main GTIN selected for material &1 and unit of measure &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MK - Mass Handling in the Material Master

• Message number: 026

• Message text: No main GTIN selected for material &1 and unit of measure &2

What causes this issue?

No GTIN was marked as the main GTIN for article &V1& and unit of measure
&V2&; this is not allowed.

System Response

The affected data records for article &V1& and unit of measure &V2& were
marked as having errors.

How to fix this error?

Adjust the <ZK>Main GTIN</> indicator so that exactly one GTIN is
classified as the main GTIN for each article and unit of measure.
You can correct the error in two ways:
By adjusting the data in your input file/in the clipboard
In the transaction, by correcting the <ZK>Main GTIN</> indicator in one
of the incorrect GTINs for this article and unit of measure.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MK026 - No main GTIN selected for material &1 and unit of measure &2 ?

  The SAP error message MK026 "No main GTIN selected for material &1 and unit of measure &2" typically occurs when the system is unable to find a Global Trade Item Number (GTIN) associated with a specific material and its unit of measure. This can happen in various scenarios, such as during the creation of purchase orders, sales orders, or when performing inventory management tasks.
  Cause:
  
  Missing GTIN Assignment: The material in question does not have a GTIN assigned to it in the system.
  Incorrect Unit of Measure: The GTIN may be assigned to a different unit of measure than the one being used in the transaction.
  Data Inconsistency: There may be inconsistencies in the material master data or the GTIN data.
  Configuration Issues: The system may not be properly configured to handle GTINs for the specific material type or industry.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) for the material in question.
  Check the "Basic Data" and "Sales" views to ensure that a GTIN is assigned.
  If no GTIN is assigned, you can add it in the relevant view.
  
  
  
  Verify Unit of Measure:
  
  Ensure that the GTIN is assigned to the correct unit of measure. If you are using a different unit of measure in your transaction, you may need to add the GTIN for that specific unit.
  
  
  
  Maintain GTIN Data:
  
  If the GTIN is missing, you can maintain it using transaction code MM02 (Change Material) and navigate to the relevant view to add the GTIN.
  
  
  
  Check Configuration:
  
  If you suspect a configuration issue, consult with your SAP Basis or configuration team to ensure that the system is set up correctly to handle GTINs.
  
  
  
  Data Consistency Check:
  
  Run any relevant reports or transactions to check for data consistency in the material master and GTIN assignments.
  
  
  
  Related Information:
  
  GTIN: The Global Trade Item Number is a unique identifier for trade items, which can be used for tracking and inventory purposes.
  Material Master: The material master is a central repository of information related to materials in SAP, including descriptions, units of measure, and GTINs.
  Unit of Measure: Units of measure are critical in SAP for defining how quantities of materials are handled in transactions.
  
  If the issue persists after following these steps, it may be beneficial to consult SAP support or your internal SAP team for further assistance.