How To Fix FDT_CORE491 - Data objects that are part of a bound data structure cannot be unbound

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 491

• Message text: Data objects that are part of a bound data structure cannot be unbound

What causes this issue?

You have tried to remove the binding relationship of the current data
object to the corresponding object in the ABAP Dictionary (DDIC).
However, for this data object, the following applies:
The data object is bound to an object in the ABAP Dictionary.
The data object is referenced by a structure that is also bound to a
structure in the Dictionary.
In this constellation, the system prevents partial modifications to the
binding relationships in order to properly reflect the original
relationships between the bound objects in the Dictionary.

System Response

The binding of the data object cannot be changed.

How to fix this error?

If it is important for you to have another data object with the same
properties, but without binding, copy the current data object and remove
the binding from the copy.

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_CORE491 - Data objects that are part of a bound data structure cannot be unbound ?

  The SAP error message FDT_CORE491 indicates that there is an issue with data binding in the context of SAP's Flexible Data Import (FDI) or Flexible Data Transfer (FDT) framework. Specifically, this error occurs when you attempt to unbind data objects that are part of a bound data structure. 
  Cause:
  The error typically arises in the following scenarios:
  
  Data Structure Binding: You are trying to unbind a data object that is part of a data structure that has already been bound. In FDT, once a data structure is bound to a data object, you cannot unbind individual components of that structure.
  Incorrect Configuration: There may be a misconfiguration in the data model or the way the data objects are defined and bound.
  Data Model Changes: If there have been changes to the data model or the structure of the data objects, it may lead to inconsistencies that trigger this error.
  
  Solution:
  To resolve the FDT_CORE491 error, consider the following steps:
  
  
  Check Data Binding: Review the data binding configuration to ensure that you are not trying to unbind a data object that is part of a bound structure. If you need to modify the structure, you may need to unbind the entire structure instead of individual components.
  
  
  Review Data Model: Ensure that the data model is correctly defined and that all data objects are properly configured. If necessary, recreate the data structure or the data objects to ensure they are correctly bound.
  
  
  Use the Correct API/Functionality: If you are using custom code or APIs to manipulate data objects, ensure that you are using the correct methods for binding and unbinding. Refer to the SAP documentation for the appropriate functions.
  
  
  Consult Documentation: Check the SAP Help Portal or relevant documentation for any specific guidelines related to data binding and unbinding in the FDT framework.
  
  
  Debugging: If the issue persists, consider enabling debugging or logging to get more detailed information about the binding process and identify where the error is occurring.
  
  
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurs and any relevant configuration details.
  
  
  Related Information:
  
  SAP FDT Documentation: Familiarize yourself with the Flexible Data Transfer documentation provided by SAP, which includes guidelines on data binding and unbinding.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Version Compatibility: Ensure that you are using a compatible version of SAP that supports the features you are trying to implement, as there may be differences in functionality across versions.
  
  By following these steps, you should be able to diagnose and resolve the FDT_CORE491 error effectively.