DDLS491 - Field & of type & must be in the final position

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 491

• Message text: Field & of type & must be in the final position

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS491 - Field & of type & must be in the final position ?

  The SAP error message DDLS491 indicates that a field of a certain type must be in the final position within a data structure or table definition. This error typically arises when you are trying to define a structure or a table in the Data Dictionary (DDIC) and the order of the fields does not comply with the rules set by SAP.
  Cause:
  The error occurs when:
  
  You have defined a field of a certain type (like a reference field or a field with a specific attribute) that must be placed at the end of the structure or table definition, but it is not in the final position.
  This is often the case with fields that are defined as "reference fields" or fields that have specific constraints.
  
  Solution:
  To resolve the error, you should:
  
  Identify the Field: Check the error message for the specific field name and type that is causing the issue.
  Rearrange the Fields: Move the identified field to the last position in the structure or table definition.
  Activate the Changes: After making the changes, activate the structure or table definition to ensure that the changes take effect.
  
  Related Information:
  
  Data Dictionary (DDIC): The Data Dictionary in SAP is a central repository that contains definitions of all the data elements, structures, tables, and views used in the SAP system.
  Field Types: Understanding the different field types and their constraints is crucial. Some fields, like reference fields, have specific requirements regarding their position in a structure.
  SAP Documentation: For more detailed information, refer to the SAP Help Portal or the specific documentation related to the Data Dictionary and field definitions.
  
  Additional Tips:
  
  Always ensure that you follow the best practices for defining structures and tables in SAP.
  If you are unsure about the field types and their constraints, consult with a colleague or refer to SAP documentation for clarification.
  Testing the changes in a development environment before moving to production is advisable to avoid disruptions.