How To Fix DT220 - Field & lies within customer namespace

DT220 - Overview

• 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