How To Fix FDT_EXPRESSIONS562 - Invalid loop condition &1; boolean type required

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 562

• Message text: Invalid loop condition &1; boolean type required

What causes this issue?

The repeat condition must be an expression with Boolean result or a
Boolean data object.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS562 - Invalid loop condition &1; boolean type required ?

  The SAP error message FDT_EXPRESSIONS562 indicates that there is an issue with a loop condition in your expression, specifically that a boolean type is required but the provided condition does not meet this requirement. This error typically arises in the context of using the SAP Fiori Design Time (FDT) or in the context of ABAP programming where expressions are evaluated.
  Cause:
  The error occurs when:
  
  A loop condition is defined that does not evaluate to a boolean value (true or false).
  The expression used in the loop condition is either of an incorrect data type or is improperly formulated.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Loop Condition: Review the loop condition in your code or expression. Ensure that it is a valid boolean expression. For example, if you are using a variable, ensure that it is being evaluated correctly to return a boolean value.
  
  
  Correct Data Types: Ensure that the variables or expressions used in the loop condition are of the correct data type. If you are using a numeric or string type, you may need to convert or compare them to ensure they yield a boolean result.
  
  
  Debugging: If you are unsure where the issue lies, use debugging tools to step through the code and inspect the values being evaluated in the loop condition. This can help identify any unexpected values or types.
  
  
  Consult Documentation: If you are using specific functions or methods, refer to the SAP documentation to ensure that you are using them correctly and that they are expected to return a boolean value.
  
  
  Example Correction: If your loop condition looks something like this:
  LOOP AT it_table INTO DATA(line) WHERE line-field = 'value'.
  Ensure that the condition line-field = 'value' evaluates to a boolean. If line-field is not a boolean or cannot be evaluated as such, you may need to adjust your logic.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  SAP Help Portal: Utilize the SAP Help Portal for detailed documentation on expressions and loop constructs in ABAP or FDT.
  
  By following these steps, you should be able to identify and correct the issue causing the FDT_EXPRESSIONS562 error.