How To Fix XC401 - Duplicate classification of material &1

SAP Error Message - Details

• Message type: E = Error

• Message class: XC - Message Class for Core Interface

• Message number: 401

• Message text: Duplicate classification of material &1

What causes this issue?

No unique class assignment could be determined.

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

System Response

As SAP APO currently supports only simple classification for the CDP
(Characteristics Dependent Planning) classification system, no material
class will be transferred for this material.
If you have set the ERP classification system as the classification
system in SAP APO you can ignore this message.

How to fix this error?

Ensure that all classes used in the material master have the same name.
If necessary, change the names.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XC401 - Duplicate classification of material &1 ?

  The SAP error message XC401: Duplicate classification of material &1 typically occurs when there is an attempt to classify a material that has already been classified with the same characteristics in the classification system. This can happen in the context of material management and classification in SAP, where materials are assigned to specific classes and characteristics.
  Cause:
  
  Duplicate Entry: The material you are trying to classify has already been assigned to the same class with the same characteristics.
  Incorrect Data Entry: There may be a mistake in the data entry process, leading to an attempt to classify the material multiple times with the same attributes.
  System Configuration: The classification system may not be configured correctly, leading to conflicts in how materials are classified.
  
  Solution:
  
  
  Check Existing Classifications: 
  
  Go to the classification view of the material in question and check if it is already classified under the same class and characteristics.
  If it is, you may need to remove the existing classification before adding a new one.
  
  
  
  Modify Classification:
  
  If the material needs to be classified differently, consider modifying the existing classification instead of adding a duplicate entry.
  
  
  
  Review Material Master Data:
  
  Ensure that the material master data is accurate and does not contain duplicates or conflicting entries.
  
  
  
  Consult with SAP Support:
  
  If the issue persists, it may be beneficial to consult with your SAP support team or refer to SAP Notes for any known issues or patches related to classification errors.
  
  
  
  Check Configuration:
  
  Review the configuration settings in the classification system to ensure that they are set up correctly and that there are no restrictions causing this error.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like CL02 (Change Class) or MM02 (Change Material) to manage classifications.
  SAP Notes: Look for relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Refer to SAP Help documentation for more details on material classification and the classification system.
  
  By following these steps, you should be able to resolve the XC401 error and successfully classify your material in SAP.