How To Fix DT518 - Index &-& is not in the customer namespace

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 518

• Message text: Index &-& is not in the customer namespace

What causes this issue?

In a target system (customer system), a new index was created whose
name does not lie in the namespace Y or Z.
The namespaces Y and Z are reserved for extensions in target systems.

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?

Keep the <DS:TX.DDDOK_INDEX_NAMESPACE>namespaces for indexes</> in
mind.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT518 - Index &-& is not in the customer namespace ?

  The SAP error message DT518 indicates that the index you are trying to access or manipulate is not located in the customer namespace. This typically occurs when you are working with database indices in SAP and trying to reference an index that is either part of the standard SAP system or does not exist in the expected namespace.
  Cause:
  
  Non-Customer Namespace: The index you are trying to use is part of the SAP standard objects and not defined in the customer namespace (which is usually reserved for custom developments).
  Index Deletion or Renaming: The index may have been deleted or renamed, leading to the system not being able to find it.
  Transport Issues: If the index was created in a different system and not properly transported to the current system, it may not exist in the current environment.
  Development Environment: If you are working in a development environment, the index may not have been created yet.
  
  Solution:
  
  Check Index Existence: Verify if the index actually exists in the database. You can do this by using transaction codes like SE11 (Data Dictionary) to check the indices for the relevant table.
  Create the Index: If the index does not exist, you may need to create it. Ensure that you are following the correct naming conventions and that it is created in the customer namespace if that is your intention.
  Use Correct Namespace: If you are trying to access a standard index, ensure that you are using the correct name and that it is not mistakenly prefixed with a customer namespace identifier.
  Transport the Index: If the index was created in another system, ensure that it is properly transported to the current system.
  Consult Documentation: Check SAP documentation or notes related to the specific index you are trying to use for any additional guidance or updates.
  
  Related Information:
  
  Namespaces in SAP: SAP uses namespaces to differentiate between standard SAP objects and customer-specific developments. Customer namespaces typically start with a specific prefix (like Z or Y).
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing database objects.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to the DT518 error message.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or development team for further assistance.