How To Fix SY406 - Table changes not possible with format &

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 406

• Message text: Table changes not possible with format &

What causes this issue?

You entered "&V1&" as the display format.
However, you cannot change a displayed internal table when this format
is set.
You can only change tables with standard formatting.

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?

To change the table contents, overwrite the current format with a
space. If the table lines are structures, the format is automatically
set to "E" (column display with formatting).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SY406 - Table changes not possible with format & ?

  The SAP error message SY406, which states "Table changes not possible with format &," typically occurs when there is an attempt to modify a database table that is not allowed due to its format or structure. This error can arise in various scenarios, such as when trying to update a table that is defined as a view, a table that is part of a transport request, or a table that is locked for changes.
  Causes:
  
  Table Format: The table you are trying to modify may be defined in a way that does not allow changes (e.g., it could be a view or a table with a specific format).
  Transport Request: The table might be part of a transport request that is currently locked or not released for changes.
  Database Lock: The table could be locked by another user or process, preventing any modifications.
  Authorization Issues: The user may not have the necessary authorizations to make changes to the table.
  Technical Settings: The technical settings of the table may restrict certain types of changes.
  
  Solutions:
  
  Check Table Type: Verify if the table is a transparent table, pooled table, or a view. If it is a view, you cannot make direct changes to it.
  Release Transport Request: If the table is part of a transport request, ensure that the request is released and not locked.
  Check Locks: Use transaction code SM12 to check for any locks on the table. If there are locks, you may need to wait for them to be released or contact the user who has locked the table.
  Authorization Check: Ensure that the user has the necessary authorizations to modify the table. You can check this using transaction code SU53 after the error occurs.
  Technical Settings Review: Review the technical settings of the table in transaction SE11 to ensure that it is configured correctly for the intended operations.
  
  Related Information:
  
  Transaction Codes:
  
  SE11: Data Dictionary (to check table definitions)
  SM12: Display and manage locks
  SU53: Display authorization check
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for guidelines on table modifications and the implications of table formats.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.