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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG029 - Only elementary data types can be defined For fields (field &1) ?

  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 Data Type: If the field is currently defined with a complex data type, change it to an appropriate elementary data type. For example:
  
  Use CHAR for character strings.
  Use NUMC for numeric values.
  Use DATS for date values.
  
  
  
  Review Data Model Requirements: Ensure that you are following the guidelines and requirements for the specific Data Model or Data Structure you are working with. Refer to the documentation or guidelines provided by SAP for the specific context.
  
  
  Test Changes: After making the necessary changes, test the Data Model or Data Structure to ensure that the error is resolved and that it behaves as expected.
  
  
  Related Information:
  
  Elementary Data Types: In SAP, elementary data types include CHAR, NUMC, DATS, TIMS, INT, FLOAT, etc. These types are used for defining simple fields in data structures.
  Data Model Documentation: Refer to SAP's official documentation or help resources for more information on data modeling and the types of data that can be used.
  SAP Community: If you continue to face issues, consider reaching out to the SAP Community or forums where other SAP professionals may provide insights or solutions based on similar experiences.
  
  By ensuring that all fields are defined with appropriate elementary data types, you should be able to resolve the DMCLG029 error.