How To Fix DA355 - No entry & in TBATG for field conversion; CNV entry already exists

DA355 - Overview

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 355

• Message text: No entry & in TBATG for field conversion; CNV entry already exists

What causes this issue?

An entry for a field conversion is required here, a special type of
conversion.

System Response

Writing the entry into the control table TBATG is refused because an
entry already exists for a general standard conversion.

How to fix this error?

No action necessary; the conversion will be performed using the standard
conversion.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DA355 - No entry & in TBATG for field conversion; CNV entry already exists ?

  The SAP error message DA355 indicates that there is an issue with field conversion in the context of a specific table (TBATG) during a data migration or conversion process. The error message suggests that there is an attempt to create a new entry in the conversion table, but an entry with the same key already exists.
  
  Cause:
  
  
  Duplicate Entry: The most common cause of this error is that there is already an existing entry in the conversion table (TBATG) for the specific field conversion you are trying to create. This can happen if the data migration process is being run multiple times without proper cleanup or if there is a misconfiguration in the mapping of the data.
  
  
  Incorrect Mapping: If the mapping of the source and target fields is not set up correctly, it may lead to attempts to create duplicate entries.
  
  
  Data Consistency Issues: If there are inconsistencies in the data being migrated,