How To Fix AD376 - Table type changed; data may have been invalidated

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 376

• Message text: Table type changed; data may have been invalidated

What causes this issue?

The table type was changed from POOL/CLUSTER to TRANSP. For performance
reasons, it was not possible to check automatically for the existence
of data in this case. Therefore, activation was terminated as a
precautionary measure.

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?

If the table does not contain data, activation can be initiated with
the 'Force activation' function.
INCLUDE ADIC-UPDATEFORCE
However, if the table contains data, conversion is necessary. The table
can be converted (that is, the ABAP Dictionary table is activated, the
database table adjusted, and existing data converted) with the online
conversion function.
INCLUDE ADIC-DB-UTILITIES

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD376 - Table type changed; data may have been invalidated ?

  The SAP error message AD376, which states "Table type changed; data may have been invalidated," typically occurs when there has been a change in the structure or type of a database table that is being used in the application. This can happen due to various reasons, such as:
  Causes:
  
  Table Structure Change: The structure of a database table has been modified (e.g., adding or removing fields, changing data types).
  Transport Requests: Changes made in a development environment and transported to a production environment may lead to inconsistencies if the transport is not properly managed.
  Data Dictionary Changes: Changes in the Data Dictionary (DDIC) that affect the table type or its definition.
  Inconsistent Data: If the application is trying to access data that is no longer valid due to the changes made to the table structure.
  
  Solutions:
  
  Check Table Structure: Review the changes made to the table structure in the Data Dictionary (transaction SE11) to ensure that they are correct and necessary.
  Re-activate the Table: If the table has been modified, you may need to re-activate it in the Data Dictionary to ensure that the changes are properly recognized by the system.
  Clear Buffer: Sometimes, clearing the buffer can help resolve inconsistencies. You can do this using transaction code SM12 to delete any locks or SM21 to check the system log for any related issues.
  Check Transport Requests: Ensure that all relevant transport requests have been properly imported and that there are no missing objects.
  Data Consistency Check: Run consistency checks on the affected tables to identify and resolve any data inconsistencies.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide guidance on how to resolve it.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing database objects.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it involves complex changes or if you are unsure about the implications of the changes made.
  Documentation: Keep documentation of any changes made to the database schema, as this can help in troubleshooting and understanding the context of the error.
  
  By following these steps, you should be able to identify the cause of the AD376 error and implement a solution to resolve it.