How To Fix CACSDESIGN140 - Key fields must only be of type 'C' or 'N'

SAP Error Message - Details

• Message type: E = Error

• Message class: CACSDESIGN - Messages From Construction

• Message number: 140

• Message text: Key fields must only be of type 'C' or 'N'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CACSDESIGN140 - Key fields must only be of type 'C' or 'N' ?

  The SAP error message CACSDESIGN140 indicates that there is an issue with the key fields defined in a data model or a database table. Specifically, it states that key fields must only be of type 'C' (character) or 'N' (numeric). This error typically arises when you attempt to define a key field using an unsupported data type.
  Cause:
  
  Incorrect Data Type: The key field is defined with a data type that is not allowed, such as 'D' (date), 'T' (time), or any other type that is not 'C' or 'N'.
  Data Model Configuration: The configuration of the data model or database table may have been set up incorrectly, leading to the inclusion of unsupported data types as key fields.
  
  Solution:
  
  Check Data Types: Review the definition of the key fields in your data model or database table. Ensure that all key fields are defined as either character ('C') or numeric ('N').
  Modify Key Fields: If you find any key fields defined with unsupported data types, change their data type to either 'C' or 'N' as appropriate for your application.
  Recreate the Data Model/Table: If the issue persists, consider recreating the data model or table with the correct key field definitions.
  Consult Documentation: Refer to SAP documentation or guidelines for defining key fields in your specific context (e.g., ABAP Dictionary, Data Modeling in SAP BW, etc.).
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  Data Dictionary (SE11): Use transaction SE11 to view and modify the data dictionary objects, including tables and structures.
  Data Modeling Tools: If you are using tools like SAP BW or SAP HANA, ensure that you are following the best practices for data modeling in those environments.
  Testing: After making changes, test the data model or table to ensure that the error is resolved and that the application behaves as expected.
  
  By following these steps, you should be able to resolve the error message CACSDESIGN140 and ensure that your key fields are correctly defined.