How To Fix C1131 - Data type of characteristics cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 131

• Message text: Data type of characteristics cannot be changed

What causes this issue?

You want to change the data type of an existing characteristic.
To avoid data inconsistencies, this is not supported.

System Response

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

How to fix this error?

Change your entries.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1131 - Data type of characteristics cannot be changed ?

  The SAP error message C1131, which states "Data type of characteristics cannot be changed," typically occurs in the context of SAP BW (Business Warehouse) or SAP ERP when you attempt to change the data type of a characteristic in the data model. This error is related to the data integrity and consistency of the data model, as changing the data type of a characteristic can have significant implications for existing data and reports.
  Cause:
  
  Existing Data: The characteristic already has data associated with it, and changing the data type could lead to inconsistencies or data loss.
  Dependencies: The characteristic may be used in various InfoObjects, queries, or reports, and changing its data type could affect these dependencies.
  Data Model Constraints: SAP enforces certain constraints to maintain the integrity of the data model, and changing the data type may violate these constraints.
  
  Solution:
  
  Create a New Characteristic: Instead of changing the data type of the existing characteristic, create a new characteristic with the desired data type. You can then migrate the data from the old characteristic to the new one if necessary.
  Data Migration: If you create a new characteristic, you may need to handle data migration. This can be done using data transfer processes or by writing custom ABAP programs to move data from the old characteristic to the new one.
  Update Dependencies: After creating a new characteristic, ensure that all dependent objects (like InfoCubes, queries, etc.) are updated to use the new characteristic.
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or BW team for best practices regarding changes to characteristics.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error message.
  Data Model Design: When designing your data model, consider the implications of changing data types and try to plan for future changes.
  Testing: Always test changes in a development or quality assurance environment before applying them to production to avoid disruptions.
  
  If you continue to face issues or need further assistance, consider reaching out to SAP support or your internal SAP team for more tailored help.