How To Fix C$739 - Expansion mode & is not allowed for identifier tables

SAP Error Message - Details

• Message type: E = Error

• Message class: C$ -

• Message number: 739

• Message text: Expansion mode & is not allowed for identifier tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message C$739 - Expansion mode & is not allowed for identifier tables ?

  The SAP error message C$739, which states "Expansion mode & is not allowed for identifier tables," typically occurs in the context of ABAP programming, particularly when dealing with internal tables and their definitions.
  Cause:
  This error arises when you attempt to use an expansion mode (like APPEND, INSERT, or MODIFY) on an identifier table (also known as a "key" table) in a way that is not permitted. Identifier tables are typically defined with a unique key and are used to store unique entries. The expansion modes that are allowed for standard internal tables (like standard tables or sorted tables) are not applicable to identifier tables.
  Solution:
  To resolve this error, you should:
  
  
  Check the Table Type: Ensure that you are using the correct type of internal table for your operation. If you need to perform operations that involve adding or modifying entries, consider using a standard table or a sorted table instead of an identifier table.
  
  
  Modify Your Code: If you are trying to append or insert entries into an identifier table, you may need to change your logic. For example, if you need to maintain unique entries, you might want to check if the entry already exists before attempting to add it.
  
  
  Use Appropriate Operations: If you need to work with identifier tables, use operations that are allowed for them, such as reading or deleting entries, rather than trying to expand them.
  
  
  Related Information:
  
  
  Internal Table Types: Familiarize yourself with the different types of internal tables in ABAP:
  
  Standard Tables: Allow duplicate entries and are not sorted.
  Sorted Tables: Allow duplicate entries but are sorted.
  Hashed Tables: Allow unique entries and provide fast access based on the key.
  Identifier Tables: Allow unique entries and are used for specific scenarios where uniqueness is enforced.
  
  
  
  ABAP Documentation: Refer to the official SAP documentation for more details on internal tables and their operations. This can provide insights into the correct usage of different table types and their limitations.
  
  
  Debugging: If you encounter this error, use the ABAP debugger to trace the execution of your code and identify where the incorrect operation is being attempted.
  
  
  By understanding the nature of identifier tables and the operations that are permissible on them, you can effectively resolve the C$739 error and ensure your ABAP code functions as intended.