How To Fix RSDHA358 - Requested data type conversion for target field '&1' might fail

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDHA - HANA Analysis in BW

• Message number: 358

• Message text: Requested data type conversion for target field '&1' might fail

What causes this issue?

A conversion from data type &V2& to data type &V3& is requested.
Depending on the input data, the data type conversion for target field
&V1& might fail.

System Response

At runtime, the system checks whether the input data can be converted.
If one value cannot be converted, the processing of the HANA analysis
process is stopped.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDHA358 - Requested data type conversion for target field '&1' might fail ?

  The SAP error message RSDHA358 indicates that there is a potential issue with data type conversion for a target field in a data extraction or transformation process, particularly in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This error typically arises when the data type of the source field does not match the expected data type of the target field, which can lead to data integrity issues or conversion failures.
  Cause:
  
  Data Type Mismatch: The source field's data type does not match the target field's data type. For example, trying to convert a character string to a numeric type without proper formatting.
  Incompatible Data Values: The values in the source field may not be compatible with the target field's data type. For instance, if the source field contains alphanumeric characters and the target field expects only numeric values.
  Field Length Issues: The length of the data in the source field may exceed the maximum length allowed for the target field.
  Transformation Logic: The transformation rules defined in the data flow may not handle certain values correctly, leading to conversion issues.
  
  Solution:
  
  Check Data Types: Review the data types of both the source and target fields in the InfoObject or DataSource. Ensure they are compatible.
  Adjust Transformation Rules: Modify the transformation logic to handle data type conversions properly. This may involve using functions to convert data types explicitly (e.g., using TO_INTEGER, TO_CHAR, etc.).
  Data Cleansing: Ensure that the data in the source field is clean and conforms to the expected format for the target field. This may involve data cleansing steps to remove or correct incompatible values.
  Field Length Adjustments: If the source field's length exceeds the target field's length, consider increasing the target field's length or truncating the source data appropriately.
  Testing: After making changes, test the data extraction or transformation process to ensure that the error is resolved and that data is being loaded correctly.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Data Modeling: Review the data model to ensure that the data types and lengths are defined correctly for all fields involved in the transformation.
  Debugging: Use the SAP BW/BI debugging tools to trace the data flow and identify where the conversion is failing.
  Documentation: Refer to SAP documentation for best practices on data type handling and transformation in BW/BI.
  
  By addressing the underlying causes of the error and implementing the suggested solutions, you should be able to resolve the RSDHA358 error and ensure successful data processing in your SAP environment.