How To Fix DMCLG029 - Only elementary data types can be defined For fields (field &1)

DMCLG029 - Overview

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 029

• Message text: Only elementary data types can be defined For fields (field &1)

What causes this issue?

You have not entered either a field type or an elementary ABAP type
(C, P, N, D, T).

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?

Select an appropriate data type.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

DMCLG029 - Details

• The SAP error message DMCLG029 indicates that there is an issue with the definition of a field in a Data Model or Data Structure where only elementary data types are allowed. This error typically arises when you attempt to define a field using a non-elementary data type, such as a complex type or a structure.
  
  Cause:
  The error occurs when:
  
  You are trying to define a field in a Data Model or Data Structure using a data type that is not considered elementary (e.g., a structure, table, or reference type).
  The field definition is not compliant with the requirements of the Data Model or Data Structure, which only allows simple data types like CHAR, NUMC, DATS, etc.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Definition: Review the field definition that is causing the error (indicated by &1 in the error message). Ensure that it is defined using an elementary data type.
  
  
  Change