How To Fix RS_HCPR_MODEL200 - Join field '&1': data type &2 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_HCPR_MODEL - Messages related to the HANA Composite Provider Backend

• Message number: 200

• Message text: Join field '&1': data type &2 not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_HCPR_MODEL200 - Join field '&1': data type &2 not allowed ?

  The SAP error message RS_HCPR_MODEL200 Join field '&1': data type &2 not allowed typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is an issue with the data types of fields being used in a join operation within a data model or query.
  Cause:
  
  
  Incompatible Data Types: The error indicates that the data type of the join field (field '&1') is not compatible with the expected data type (data type '&2'). This often happens when you are trying to join fields from different tables or data sources that have mismatched data types (e.g., trying to join a character field with a numeric field).
  
  
  Model Configuration Issues: The data model may not be configured correctly, leading to incompatible joins. This can happen if the data model was modified or if there are changes in the underlying data sources.
  
  
  Data Source Changes: If the structure of the underlying data sources has changed (e.g., a field was modified or removed), it can lead to this error when the model tries to execute the join.
  
  
  Solution:
  
  
  Check Data Types: Review the data types of the fields involved in the join. Ensure that the data types are compatible. For example, if one field is a character type, the other should also be a character type, or you may need to convert one of the fields to match the other.
  
  
  Modify the Data Model: If the data types are indeed incompatible, you may need to adjust the data model. This could involve:
  
  Changing the data type of one of the fields in the underlying data source.
  Using a calculated field or transformation to convert the data type of one of the fields before the join.
  
  
  
  Check for Changes in Data Sources: If there have been recent changes to the data sources, verify that the fields used in the join still exist and have the correct data types.
  
  
  Rebuild the Model: In some cases, it may be necessary to rebuild the data model or the specific query to ensure that all joins are valid and that the data types align correctly.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance related to your version of SAP BW or HANA, as there may be version-specific considerations.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Data Modeling Best Practices: Familiarize yourself with best practices for data modeling in SAP BW or HANA to avoid similar issues in the future.
  SAP Community: Engage with the SAP Community for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.