How To Fix FDT_EXPRESSIONS567 - Only &1 is allowed as result for a loop expression

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 567

• Message text: Only &1 is allowed as result for a loop expression

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS567 - Only &1 is allowed as result for a loop expression ?

  The SAP error message FDT_EXPRESSIONS567 indicates that there is an issue with the result of a loop expression in your SAP application. This error typically arises in the context of using the SAP Fiori or SAP Business Technology Platform (BTP) where expressions are evaluated in a loop, and the result must conform to specific requirements.
  Cause:
  The error message "Only &1 is allowed as result for a loop expression" suggests that the loop expression is expected to return a specific type of result, but it is returning something else. This can happen due to:
  
  Incorrect Data Type: The result of the loop expression does not match the expected data type.
  Multiple Results: The loop expression may be returning multiple results when only a single result is expected.
  Logic Error: There may be a logical error in the expression that causes it to evaluate incorrectly.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Loop Expression: Review the loop expression to ensure that it is correctly defined and that it is returning the expected type of result. Make sure that the expression is designed to return a single value if that is what is required.
  
  
  Data Type Validation: Ensure that the data type of the result matches the expected type. If the loop is expected to return a specific type (e.g., a single integer, string, etc.), make sure that the expression adheres to this requirement.
  
  
  Debugging: Use debugging tools to step through the expression and see what values are being generated during the loop. This can help identify where the logic may be going wrong.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific function or expression you are using to ensure that you are following the correct syntax and logic.
  
  
  Simplify the Expression: If the expression is complex, try simplifying it to isolate the issue. Start with a basic version of the loop and gradually add complexity until the error reappears.
  
  
  Seek Help from Community or Support: If you are unable to resolve the issue, consider reaching out to the SAP community forums or SAP support for assistance. Provide them with details about the expression and the context in which the error occurs.
  
  
  Related Information:
  
  SAP Fiori Elements: If you are working with SAP Fiori applications, understanding how expressions and data binding work in Fiori Elements can be beneficial.
  SAP Business Application Studio: Familiarize yourself with the tools available in the SAP Business Application Studio for debugging and testing expressions.
  SAP Help Portal: The SAP Help Portal contains extensive documentation on expressions, data types, and error messages that can provide additional context and solutions.
  
  By following these steps, you should be able to identify and resolve the issue causing the FDT_EXPRESSIONS567 error in your SAP application.