How To Fix D0751 - & is already defined as structure or table

SAP Error Message - Details

• Message type: E = Error

• Message class: D0 - Machine-level ABAP/4 Dictionary texts (e.g. debugging)

• Message number: 751

• Message text: & is already defined as structure or table

What causes this issue?

You tried to create an object with a name which was already assigned
to another object of another type.

System Response

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

How to fix this error?

Choose another name for your object.
This text is also included from D0752 to D0759.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message D0751 - & is already defined as structure or table ?

  The SAP error message D0751 typically indicates that there is an issue with the definition of a data element or structure in the ABAP Dictionary. Specifically, the message states that a certain name is already defined as a structure or table, which means that there is a naming conflict in your ABAP Dictionary objects.
  Cause:
  
  Naming Conflict: The most common cause of this error is that you are trying to create a new data element, structure, or table with a name that is already in use by another object in the ABAP Dictionary.
  Incorrect Object Type: You might be trying to define an object that is not compatible with the existing object of the same name.
  Namespace Issues: If you are working in a system with multiple namespaces, you might be inadvertently trying to use a name that is reserved or already taken in another namespace.
  
  Solution:
  
  Check Existing Definitions: Use transaction SE11 (Data Dictionary) to check if the name you are trying to use is already defined. Look for structures, tables, or data elements with the same name.
  Rename Your Object: If you find that the name is already in use, consider renaming your new object to something unique that does not conflict with existing definitions.
  Use a Namespace: If applicable, use a custom namespace for your objects to avoid conflicts with standard SAP objects or other custom objects.
  Review Object Types: Ensure that you are creating the correct type of object (e.g., data element vs. structure) and that you are not trying to redefine an existing object.
  
  Related Information:
  
  Transaction Codes: 
  
  SE11: Data Dictionary
  SE80: Object Navigator
  
  
  Documentation: Refer to SAP Help documentation for more details on naming conventions and object definitions in the ABAP Dictionary.
  Naming Conventions: Familiarize yourself with SAP's naming conventions to avoid conflicts in the future.
  
  If you continue to experience issues after checking for naming conflicts and ensuring that you are using the correct object types, consider reaching out to your SAP Basis or ABAP development team for further assistance.