How To Fix FDT_EXPRESSIONS109 - Check if result type of leaf node &1 is compatible with tree result type

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 109

• Message text: Check if result type of leaf node &1 is compatible with tree result type

What causes this issue?

The result data object assigned to leaf node &v1& is bound to another
data object. The system check cannot determine if the other object from
which leaf node &v1& inherits its properties is compatible with the
result data object of the tree expression.
Such compatibility is, however, a prerequisite for proper operation of
the search tree if multiple match mode has been turned on.

System Response

If the structure of the data objects assigned to the leaf node and to
the expression do not match, a runtime error will occur when the
expression is evaluated.

How to fix this error?

If multiple match mode is active for the search tree expression, make
sure that the data object which is bound to leaf node &v1& is compatible
with the structure of the table result data object assigned to the
expression.

Procedure for System Administrators

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_EXPRESSIONS109 - Check if result type of leaf node &1 is compatible with tree result type ?

  The SAP error message FDT_EXPRESSIONS109 indicates that there is a type compatibility issue in an expression tree within the SAP system, specifically in the context of Field-Based Data Transformation (FDT). This error typically arises when the result type of a leaf node (a terminal node in the expression tree) does not match the expected result type of the overall expression tree.
  Cause:
  
  Type Mismatch: The most common cause of this error is that the data type of the leaf node (e.g., a field or variable) does not match the expected data type defined for the expression tree. For example, if the expression tree expects a numeric type but the leaf node is a string, this error will occur.
  Incorrect Configuration: The configuration of the expression tree may be incorrect, leading to mismatched types.
  Data Source Issues: If the data source from which the leaf node is derived has changed or is not correctly defined, it may lead to type incompatibility.
  
  Solution:
  
  Check Data Types: Review the data types of the leaf node and the expected result type of the expression tree. Ensure that they are compatible. You may need to convert the data type of the leaf node to match the expected type.
  Modify Expression Tree: If the expression tree is incorrectly configured, you may need to modify it to ensure that the types align correctly. This may involve changing the logic or structure of the expression.
  Data Source Validation: Ensure that the data source for the leaf node is correctly defined and that it provides the expected data type. If there are changes in the data source, update the expression tree accordingly.
  Use Type Conversion Functions: If necessary, use type conversion functions (like CAST or CONVERT) to explicitly convert the data type of the leaf node to match the expected type.
  
  Related Information:
  
  FDT Documentation: Refer to the SAP documentation on Field-Based Data Transformation for detailed information on how to define and manage expression trees.
  Debugging Tools: Utilize SAP debugging tools to trace the execution of the expression and identify where the type mismatch occurs.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the FDT_EXPRESSIONS109 error and ensure that your expression tree functions correctly.