How To Fix AD421 - Generic buffering requires a number of key fields to be entered

AD421 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 421

• Message text: Generic buffering requires a number of key fields to be entered

What causes this issue?

You have selected the generic buffering for the table. This
method of buffering loads all records, which correspond with regard to
the left-hand part of the primary key, into the buffer. The size of
this key area must be defined by specifying a number of key fields.

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?

Enter a key field number. To do this, select pushbutton <LS>Chnge key
fld no.</> and enter a number of key fields into the dialog box that
appears.

Error message extract from SAP system. Copyright SAP SE.

AD421 - Details

• The SAP error message AD421, which states "Generic buffering requires a number of key fields to be entered," typically occurs when you are trying to use generic buffering for a database table or view that requires specific key fields to be defined. This error is often encountered in the context of performance optimization, where generic buffering is used to improve data access times.
  
  Cause:
  The error arises because:
  
  Missing Key Fields: The table or view you are trying to buffer requires certain key fields to be specified, but they are not provided in your buffering configuration.
  Incorrect Buffering Settings: The buffering settings may not be correctly configured for the specific table or view.
  Generic Buffering Restrictions: SAP has specific rules regarding which tables can use generic buffering and under what conditions.
  
  
  Solution:
  To resolve the AD421 error, you can take the following steps:
  
  
  Check Table Definition:
  
  Go to the Data Dictionary (transaction SE11) and check the definition of the