How To Fix GU662 - The line item table & cannot be enhanced

SAP Error Message - Details

• Message type: E = Error

• Message class: GU - FI-SL utilities

• Message number: 662

• Message text: The line item table & cannot be enhanced

What causes this issue?

Beginning with Release 3.0, the following fields are added to the
line item tables in Special Purpose Ledger via a program when the
update takes place:
REFDOCNR Reference document number
REFRYEAR Assigned year
REFDOCLN Assigned line
REFDOCCT Assigned document type
REFACTIV Assigned activity
AWTYP Document type
AWORG Document number
LOGSYS Logical system
If the table does not have the necessary space available, at least the
fields REFDOCNR, REFDOCCT, AWTYP and AWORG are added.
Your table &v1& is a pool table and no longer has enough available
space in order to include these fields.
This mainly has effects on the drill down. Beginning with 3.0, separate
document numbers are, for example, assigned in Special Purpose Ledger
and the original document numbers are stored in REFDOCNR or AWTYP/AWORG.
If these fields are missing, it is not possible to link the original
document to the SL document.

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?

Check whether all fields in your line item are necessary.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GU662 - The line item table & cannot be enhanced ?

  The SAP error message GU662 indicates that the line item table specified cannot be enhanced. This typically occurs in the context of SAP's data model, particularly when dealing with line item tables in financial or controlling modules.
  Cause:
  
  Table Restrictions: The line item table you are trying to enhance may have restrictions that prevent it from being modified. This could be due to the table being a standard SAP table that is not designed for enhancements.
  Data Model Limitations: Some tables are defined in such a way that they cannot be enhanced due to their role in the data model. For example, line item tables often have specific structures that are critical for performance and data integrity.
  Custom Development: If you are trying to enhance a table that is not intended for custom fields or additional data, this error may arise.
  
  Solution:
  
  Check Table Properties: Review the properties of the line item table in the Data Dictionary (SE11). Look for any indicators that specify whether the table can be enhanced or modified.
  Use Append Structures: If you need to add fields to a standard table, consider using an append structure instead of trying to enhance the table directly. This allows you to add custom fields without modifying the original table structure.
  Custom Tables: If the requirement is to store additional data that cannot be accommodated in the existing line item table, consider creating a custom table that links to the original table through a foreign key relationship.
  Consult Documentation: Review SAP documentation or notes related to the specific table and its enhancement options. There may be specific guidelines or recommendations provided by SAP.
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights or alternative approaches based on your specific scenario.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing and viewing table structures.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide guidance on enhancing line item tables.
  Development Guidelines: Review SAP's development guidelines for best practices when working with standard tables and enhancements.
  
  By following these steps, you should be able to address the GU662 error and find a suitable approach for your enhancement needs.