How To Fix AD237 - Only structures can be included in database tables

AD237 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 237

• Message text: Only structures can be included in database tables

What causes this issue?

A database table may not be included either directly or indirectly in
another database table.
This means that a structure that in turn includes a database table may
not be included either.

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 cannot include the table (or the structure containing a table).
You can:
Directly insert the fields.
Create a copy of the included DB table as structure and include it.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD237 - Only structures can be included in database tables ?

  The SAP error message AD237 ("Only structures can be included in database tables") typically occurs when you attempt to include a data element or a field that is not a structure in a database table definition. In SAP ABAP Dictionary, database tables can only contain fields that are defined as structures or data elements that are based on structures.
  
  Cause:
  
  Incorrect Field Type: You may have tried to include a field that is defined as a simple data type (like a character or numeric type) instead of a structure.
  Data Element Misconfiguration: The data element you are trying to use might not be defined correctly or is not based on a structure.
  Inclusion of Non-Structure Types: Attempting to include a table or view directly in a database table definition, which is not allowed.
  
  
  Solution:
  
  Check Field Definitions: Ensure that all fields you are trying to include in the database table are either structures or data elements