How To Fix DT220 - Field & lies within customer namespace

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 220

• Message text: Field & lies within customer namespace

What causes this issue?

You defined a field in the namespace YY or ZZ in a table.
These field names are allowed only in customer 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?

You must use other field names in in-house SAP systems.
This check is not made in customer systems.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT220 - Field & lies within customer namespace ?

  The SAP error message DT220, which states "Field & lies within customer namespace," typically occurs when there is an issue related to the naming conventions or the use of fields in a custom development context. This error is often encountered in ABAP programming or when working with custom enhancements in SAP.
  Cause:
  
  Field Naming Conflict: The error indicates that a field is being referenced that is defined in the customer namespace (usually starting with "Z" or "Y"). This can happen if the field is not properly defined or if there is a conflict with standard SAP fields.
  Inconsistent Data Dictionary: The field may not exist in the data dictionary or may not be activated properly.
  Transport Issues: If the field was recently created or modified and the transport request has not been properly imported into the target system, it may lead to this error.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access the custom field.
  
  Solution:
  
  Check Field Definition: Verify that the field is correctly defined in the Data Dictionary (SE11). Ensure that it exists and is activated.
  Review Naming Conventions: Ensure that the field name adheres to the naming conventions and does not conflict with standard SAP fields.
  Transport Request: If the field was recently created or modified, ensure that the transport request has been successfully imported into the system where the error is occurring.
  Authorization Check: Ensure that the user has the necessary authorizations to access the custom field.
  Debugging: If you are a developer, you can use the ABAP debugger to trace where the error is occurring and check the context in which the field is being used.
  Consult Documentation: If the field is part of a custom development, consult the documentation or the developer who created it for more context.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), and SE37 (Function Builder) to investigate the field and its usage.
  SAP Notes: Check SAP Notes for any known issues related to this error message. Sometimes, SAP provides patches or updates that can resolve such issues.
  Community Forums: Consider checking SAP Community or other forums for similar issues faced by other users, as they may provide insights or solutions.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP Basis or ABAP development team for further assistance.