How To Fix FDT_EXPRESSIONS719 - Cannot use nested object as source (position &1)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 719

• Message text: Cannot use nested object as source (position &1)

What causes this issue?

During execution of a business rule, the system has tried to access the
object at position &V1& for reading. However, this object cannot be
accessed 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 read.

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_EXPRESSIONS719 - Cannot use nested object as source (position &1) ?

  The SAP error message FDT_EXPRESSIONS719 indicates that there is an issue with using a nested object as a source in a data expression. This typically occurs in the context of SAP's Flexible Data Model (FDT) or when working with expressions in SAP applications, such as SAP S/4HANA or SAP Fiori.
  Cause:
  The error arises when you attempt to use a nested object (an object that is part of another object) as a source for an expression. In many cases, the system does not support this type of operation because it can lead to ambiguity or complexity in data retrieval and processing.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the Expression: Check the expression where the error occurs. Ensure that you are not trying to directly reference a nested object. Instead, you should reference the parent object or use a different approach to access the data you need.
  
  
  Flatten the Structure: If possible, flatten the data structure so that you are working with top-level objects. This may involve restructuring your data model or changing how you access the data.
  
  
  Use Intermediate Variables: If you need to work with data from a nested object, consider creating intermediate variables or using additional expressions to extract the necessary data from the nested object before using it in your main expression.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using. There may be guidelines or best practices for working with expressions and nested objects.
  
  
  Check for Updates: Ensure that your SAP system is up to date. Sometimes, issues like these can be resolved in newer versions or patches.
  
  
  Seek Help from SAP Support: If the issue persists and you cannot find a solution, consider reaching out to SAP support for assistance. They may provide insights specific to your implementation or version.
  
  
  Related Information:
  
  SAP FDT Documentation: Review the official SAP documentation related to Flexible Data Models and expressions to understand the limitations and best practices.
  Community Forums: Check SAP Community forums or other user groups where similar issues may have been discussed. Other users may have encountered the same error and found solutions.
  Debugging Tools: Utilize SAP debugging tools to trace the execution of your expressions and identify where the nested object is being incorrectly referenced.
  
  By following these steps, you should be able to address the FDT_EXPRESSIONS719 error and successfully work with your data expressions in SAP.