How To Fix E2164 - The customer namespace must be defined for active tables

E2164 - Overview

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 164

• Message text: The customer namespace must be defined for active tables

What causes this issue?

The customer namespace must be defined for active database tables with
the delivery class E or G.
This table is not yet active.

System Response

Information.

How to fix this error?

Activate the table and perform the action once again.

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 E2164 - The customer namespace must be defined for active tables ?

  The SAP error message E2164, "The customer namespace must be defined for active tables," typically occurs when you are trying to activate a table in the Data Dictionary (SE11) that does not have a defined customer namespace. This is particularly relevant in systems where the use of customer namespaces is enforced for custom developments.
  
  Cause:
  
  Missing Customer Namespace: The table you are trying to activate is not defined in a customer namespace. In SAP, customer namespaces are typically defined with a prefix (like Z or Y), and standard SAP objects should not be modified directly.
  Development Class: The table might be assigned to a development class that is not a customer namespace. This can happen if the table is created in a package that is part of the SAP standard or a non-customer namespace.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Development Class:
  
  Go to transaction SE11 (Data Dictionary).
  Enter the name of