How To Fix FDT_EXPRESSIONS650 - Result of later step &1 cannot be mapped to previous step &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 650

• Message text: Result of later step &1 cannot be mapped to previous step &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS650 - Result of later step &1 cannot be mapped to previous step &2 ?

  The SAP error message FDT_EXPRESSIONS650 indicates that there is an issue with the mapping of results between different steps in a data transformation process, typically within the context of SAP's Flexible Data Import (FDI) or similar data processing frameworks. The error message suggests that the result of a later step cannot be correctly mapped to a previous step, which can occur due to various reasons.
  Causes:
  
  Data Type Mismatch: The data type of the output from the later step does not match the expected input type of the previous step.
  Inconsistent Data Structure: The structure of the data being processed may have changed, leading to inconsistencies in how data is expected to flow between steps.
  Missing or Incorrect Mapping: There may be a missing mapping definition or an incorrect mapping configuration between the steps.
  Logical Errors in Expressions: If there are expressions or calculations involved, they may be logically incorrect or not yield the expected results.
  Versioning Issues: If there are different versions of the data model or transformation logic, it may lead to incompatibilities.
  
  Solutions:
  
  Check Data Types: Verify that the data types of the outputs from the later step and the inputs to the previous step are compatible. Adjust the data types if necessary.
  Review Mapping Configuration: Go through the mapping configuration to ensure that all necessary mappings are defined correctly and that they align with the expected data structure.
  Validate Expressions: If expressions are used in the transformation, validate them to ensure they are logically correct and yield the expected results.
  Debugging: Use debugging tools available in SAP to trace the data flow and identify where the mapping fails. This can help pinpoint the exact step causing the issue.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific transformation steps and their requirements.
  Test with Sample Data: Create a simplified version of the data transformation with sample data to isolate the issue and test different configurations.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  Training and Documentation: Review training materials or documentation related to SAP FDI or the specific module you are working with to better understand the data transformation process.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.