How To Fix NRSCNV156 - Characteristic &1 is already part of key fields

SAP Error Message - Details

• Message type: E = Error

• Message class: NRSCNV - Message class

• Message number: 156

• Message text: Characteristic &1 is already part of key fields

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message NRSCNV156 - Characteristic &1 is already part of key fields ?

  The SAP error message NRSCNV156 indicates that a characteristic you are trying to add to a key field in a data model or InfoObject is already part of the key fields. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when you are trying to modify the structure of an InfoObject or a data model.
  Cause:
  The error arises when:
  
  You attempt to add a characteristic to the key fields of an InfoObject or a data model, but that characteristic is already defined as a key field.
  There is a conflict in the definition of key fields, which can happen during the modeling process or when trying to change the structure of an existing InfoObject.
  
  Solution:
  To resolve the NRSCNV156 error, you can take the following steps:
  
  
  Check Key Fields: Review the current key fields of the InfoObject or data model. Ensure that the characteristic you are trying to add is not already included in the key fields.
  
  
  Modify Key Fields: If you need to change the key fields:
  
  Remove the characteristic from the key fields if it is already included.
  If you are trying to add a new characteristic, ensure that it is not already part of the key fields.
  
  
  
  Use Transaction Codes: Use transaction codes like RSA1 (Data Warehousing Workbench) to navigate to the InfoObject and check its properties.
  
  
  Check Dependencies: Ensure that there are no dependencies or constraints that prevent you from modifying the key fields. This includes checking for existing data models, queries, or reports that may rely on the current structure.
  
  
  Documentation: Refer to SAP documentation or help resources for specific guidelines on modifying InfoObjects and key fields.
  
  
  Consult with Team: If you are unsure about the changes, consult with your SAP BW team or a functional consultant who can provide insights based on the specific context of your data model.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered the same issue.
  Training and Documentation: Consider reviewing training materials or documentation related to InfoObject modeling and key field management in SAP BW.
  
  By following these steps, you should be able to resolve the NRSCNV156 error and successfully modify your InfoObject or data model as needed.