How To Fix DMCLG140 - The data types of key relationship &1 are not equal

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 140

• Message text: The data types of key relationship &1 are not equal

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG140 - The data types of key relationship &1 are not equal ?

  The SAP error message DMCLG140 indicates that there is a mismatch in the data types of key relationships in your data model. This typically occurs when you are trying to create or modify a data model in SAP BW (Business Warehouse) or SAP HANA, and the keys that are supposed to relate two tables or data sources do not have compatible data types.
  Cause:
  
  Data Type Mismatch: The most common cause is that the key fields in the two tables or data sources you are trying to relate have different data types (e.g., one is an integer and the other is a string).
  Inconsistent Metadata: If the metadata for the data sources has not been updated or is inconsistent, it can lead to this error.
  Changes in Source Systems: If there have been changes in the source systems (like changes in data types of fields), it can lead to this error when trying to establish relationships in SAP BW or HANA.
  
  Solution:
  
  Check Data Types: Verify the data types of the key fields in both tables or data sources. Ensure that they are the same. You can do this by checking the data dictionary or the metadata of the respective objects.
  Modify Data Types: If you find a mismatch, you may need to modify the data type of one of the fields to ensure they match. This can involve changing the data type in the source system or adjusting the data model in SAP.
  Update Metadata: If the data types are correct but the error persists, try refreshing or updating the metadata in your SAP BW or HANA system. This can often resolve inconsistencies.
  Check Transformations: If you are using transformations to load data, ensure that the transformations are correctly mapping the fields and that the data types are compatible.
  Consult Documentation: Review SAP documentation or notes related to this error for any specific guidance or updates that may apply to your version of SAP.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Data Modeling Guidelines: Familiarize yourself with best practices for data modeling in SAP BW or HANA to avoid similar issues in the future.
  Testing: After making changes, test the data model to ensure that the relationships are established correctly and that data can be loaded without errors.
  
  By following these steps, you should be able to resolve the DMCLG140 error and ensure that your data model is functioning correctly.