How To Fix RSDHA409 - Data type mismatch for mapped task input field '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDHA - HANA Analysis in BW

• Message number: 409

• Message text: Data type mismatch for mapped task input field '&1'

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 RSDHA409 - Data type mismatch for mapped task input field '&1' ?

  The SAP error message RSDHA409 indicates a data type mismatch for a mapped task input field in a data flow or transformation process, typically within the context of SAP BW (Business Warehouse) or SAP HANA. This error occurs when the data type of the source field does not match the expected data type of the target field in the mapping.
  Cause:
  
  Data Type Mismatch: The most common cause is that the source field's data type (e.g., CHAR, NUMC, DEC, etc.) does not match the target field's data type in the transformation or data flow.
  Field Length Issues: The length of the source field may exceed the length defined for the target field.
  Incorrect Mapping: The mapping configuration may be incorrect, leading to an attempt to map incompatible data types.
  Changes in Data Model: If there have been recent changes to the data model (e.g., changes in InfoObjects or data types), this can lead to mismatches.
  
  Solution:
  
  Check Data Types: Verify the data types of both the source and target fields in the transformation. Ensure they are compatible.
  Adjust Field Lengths: If the source field's length exceeds the target field's length, consider adjusting the target field's length or truncating the source data appropriately.
  Review Mapping Configuration: Go through the mapping configuration in the transformation to ensure that the correct fields are mapped and that the data types align.
  Data Type Conversion: If necessary, use conversion functions in the transformation to convert the data type of the source field to match the target field.
  Test with Sample Data: Run tests with sample data to ensure that the transformation works correctly after making adjustments.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RSDHA409 for any specific patches or updates that may address known issues.
  Documentation: Refer to SAP BW or SAP HANA documentation for guidelines on data type compatibility and transformation rules.
  Debugging: Use the debugging tools available in SAP BW or HANA to trace the data flow and identify where the mismatch occurs.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the RSDHA409 error and ensure that your data mappings are correctly configured.