How To Fix FDT_EXPRESSIONS717 - Cannot change a nested object directly (position &1)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 717

• Message text: Cannot change a nested object directly (position &1)

What causes this issue?

During execution of a business rule, the system has tried to change the
object at position &v1&. However, this object cannot be changed directly
here because it is nested in a superordinate object.
Examples for nested objects:
A structure which is part of a table, due to missing line information.
A field of a structure which is part of a table.

System Response

The nested object cannot be changed.

How to fix this error?

Redesign the business rule such that the rule directly accesses the
object in question, rather than trying to access it via the
superordinate object.

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_EXPRESSIONS717 - Cannot change a nested object directly (position &1) ?

  The SAP error message FDT_EXPRESSIONS717 indicates that there is an attempt to change a nested object directly, which is not allowed in the context of the SAP system. This error typically arises in the context of using the SAP Fiori Design Studio or when working with expressions in the SAP FDT (Form Data Tool).
  Cause:
  The error occurs when you try to modify a nested object (like a field within a structure or a sub-object) directly. In SAP, nested objects are often treated as immutable in certain contexts, meaning you cannot change them directly without following the proper procedures or methods.
  Solution:
  To resolve this error, you should follow these steps:
  
  
  Identify the Nested Object: Determine which nested object is causing the issue. The error message will provide a position (like &1) that can help you identify the specific object.
  
  
  Use Proper Methods: Instead of trying to change the nested object directly, use the appropriate methods or functions provided by the SAP framework to modify the object. This may involve:
  
  Creating a new instance of the object with the desired changes.
  Using setter methods to update the properties of the nested object.
  
  
  
  Check Documentation: Refer to the SAP documentation for the specific context you are working in (e.g., Fiori, FDT) to understand the correct way to handle nested objects.
  
  
  Debugging: If you are unsure where the error is occurring, use debugging tools to step through the code and identify the exact line that triggers the error.
  
  
  Consult with Colleagues or SAP Support: If the issue persists, consider reaching out to colleagues who have experience with SAP FDT or contacting SAP support for further assistance.
  
  
  Related Information:
  
  SAP Fiori Design Studio: Familiarize yourself with the principles of Fiori and how it handles data binding and object manipulation.
  SAP FDT Documentation: Review the official SAP documentation for Form Data Tool to understand how to work with expressions and nested objects correctly.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  
  By following these steps, you should be able to resolve the FDT_EXPRESSIONS717 error and successfully work with nested objects in your SAP environment.