How To Fix C1873 - Characteristic(s) not in knowledge base (modeling)

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 873

• Message text: Characteristic(s) not in knowledge base (modeling)

What causes this issue?

In your configuration model, at least one characteristic is not in any
class that is assigned to the configurable object (such as material).
To display a list of these characteristics, choose <ZH>Extras ->
Display warnings</>.

System Response

Values assigned to these characteristics are not saved and are not
available if you call the configuration again later.

How to fix this error?

Assign the characteristics to a variant class that is assigned to the
configurable object.

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 C1873 - Characteristic(s) not in knowledge base (modeling) ?

  The SAP error message C1873, which states "Characteristic(s) not in knowledge base (modeling)," typically occurs in the context of SAP's Advanced Planning and Optimization (APO) or similar modeling environments where characteristics are used to define product attributes or other relevant data.
  Cause:
  The error usually arises when you are trying to use a characteristic in a model or planning scenario that has not been defined or is not available in the knowledge base. This can happen due to several reasons:
  
  Missing Characteristics: The characteristic you are trying to use has not been created or activated in the system.
  Incorrect Configuration: The characteristic may not be properly configured in the relevant planning area or model.
  Data Transfer Issues: If data is being transferred from another system or environment, there may be discrepancies or missing data.
  Versioning Issues: If you are working with different versions of the model or planning area, the characteristic may exist in one version but not in another.
  
  Solution:
  To resolve the C1873 error, you can take the following steps:
  
  
  Check Characteristic Definition:
  
  Go to the relevant transaction (e.g., /SAPAPO/MC62 for characteristics) and verify that the characteristic exists in the knowledge base.
  If it does not exist, create the characteristic and ensure it is properly defined.
  
  
  
  Activate the Characteristic:
  
  If the characteristic exists but is not activated, activate it in the relevant planning area or model.
  
  
  
  Review Planning Area Configuration:
  
  Ensure that the characteristic is included in the planning area configuration. You can check this in the planning area settings.
  
  
  
  Data Consistency Check:
  
  Perform a consistency check on the data to ensure that all necessary characteristics are present and correctly configured.
  
  
  
  Check for Transport Issues:
  
  If the characteristic was recently transported from another system, ensure that the transport was successful and that all necessary objects were included.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific version of the software you are using for any known issues or additional troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific fixes or updates related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/MC62 for characteristics and /SAPAPO/MC73 for planning area configuration.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify and resolve the cause of the C1873 error in your SAP environment.