How To Fix TA251 - & Tables cannot be converted

SAP Error Message - Details

• Message type: E = Error

• Message class: TA - Extended table maintenance (eval., Customizing, client copy)

• Message number: 251

• Message text: & Tables cannot be converted

What causes this issue?

The table definitions differ between the systems. These differences
mean that a copy of the data can cause a data loss and system
inconsistencies.
Differences occur when further developments were not transported or
were copied between different maintenance levels.

System Response

A client copy cannot be made between the systems.

How to fix this error?

Transport all the developments of table structures between the systems
using the Transport Organizer and bring your system to the same
development level.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TA251 - & Tables cannot be converted ?

  The SAP error message TA251 typically indicates that there is an issue with the conversion of a table, often related to the data dictionary or database structure. This error can occur during various operations, such as when trying to activate a table or during a transport request.
  Cause of Error TA251
  
  Inconsistent Data Dictionary: The data dictionary may have inconsistencies, such as missing or incorrect definitions for the table.
  Database Issues: There may be issues with the underlying database, such as corruption or misconfiguration.
  Transport Issues: If the table was transported from another system, there may be inconsistencies between the source and target systems.
  Version Mismatch: The version of the SAP system may not support certain features or structures defined in the table.
  Locking Issues: The table may be locked by another process, preventing the conversion from completing.
  
  Solutions
  
  Check Data Dictionary: Use transaction SE11 to check the table definition and ensure that it is consistent. Look for any missing fields or incorrect data types.
  Activate Table: Try to manually activate the table using transaction SE11. This can sometimes resolve issues related to the data dictionary.
  Check Transport Logs: If the error occurred after a transport, check the transport logs for any errors or warnings that may indicate what went wrong.
  Database Consistency Check: Run database consistency checks to ensure that there are no underlying issues with the database.
  Clear Locks: Use transaction SM12 to check for and clear any locks on the table that may be preventing the conversion.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Restart: In some cases, a system restart may help clear temporary issues that could be causing the error.
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SM12 (Lock Entries).
  SAP Notes: Regularly check for SAP Notes related to TA251 and table conversion issues, as SAP frequently updates their knowledge base with solutions and workarounds.
  Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it is impacting production systems.
  
  By following these steps, you should be able to diagnose and resolve the TA251 error effectively.