How To Fix AD256 - KeyFieldDisp. = 0; change keyFieldDisp only if generic buffering selected

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 256

• Message text: KeyFieldDisp. = 0; change keyFieldDisp only if generic buffering selected

What causes this issue?

It is only necessary to enter the number of key fields if a table is
being buffered generically. For this to be possible, a table must have
more than one key field.

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?

No further data is required if you select buffering type 'P', 'X' or
'No buffering'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD256 - KeyFieldDisp. = 0; change keyFieldDisp only if generic buffering selected ?

  The SAP error message AD256 indicates an issue related to the configuration of key field display settings in the context of generic buffering. This error typically arises when there is an attempt to change the display settings of a key field while the system is configured to use generic buffering.
  Cause:
  The error occurs because the system is trying to modify the KeyFieldDisp (Key Field Display) parameter when the generic buffering option is selected. In SAP, generic buffering allows for more efficient data retrieval by caching data in memory, but it imposes certain restrictions on how key fields can be displayed. Specifically, the KeyFieldDisp parameter should not be changed unless the generic buffering is not in use.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Buffering Settings:
  
  Go to the transaction code SE11 (Data Dictionary) and check the buffering settings for the relevant table.
  If the table is set to use generic buffering, you should not attempt to change the KeyFieldDisp parameter.
  
  
  
  Modify KeyFieldDisp:
  
  If you need to change the KeyFieldDisp, you will need to disable generic buffering for that table. This can be done in the table's technical settings.
  Navigate to the table in SE11, go to the "Technical Settings" and uncheck the option for generic buffering.
  
  
  
  Transport Changes:
  
  If you are making changes in a development environment, ensure that you transport the changes to the appropriate environments (e.g., QA, Production) after testing.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP Basis team for best practices regarding buffering and key field display settings.
  
  
  
  Related Information:
  
  Generic Buffering: This is a performance optimization feature in SAP that allows for the caching of data in memory to reduce database access times.
  Key Field Display: This refers to how key fields are presented in the user interface, which can affect usability and data entry.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  
  If the issue persists after following these steps, consider reaching out to SAP support or your internal SAP team for further assistance.