How To Fix RSDS129 - Data structures were changed. Start transaction beforehand

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 129

• Message text: Data structures were changed. Start transaction beforehand

What causes this issue?

The generated data structure and the generated access program were
changed since they were last used. Only the old references are stored in
the program buffer.

System Response

You can only use the generated code (and the preview function) when the
transaction is restarted. When you restart the transaction, current
sources are loaded.

How to fix this error?

Restart the transaction.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS129 - Data structures were changed. Start transaction beforehand ?

  The SAP error message RSDS129 indicates that there have been changes made to the data structures of the InfoProvider or the underlying data source, which can affect the data extraction process. This error typically occurs in the context of SAP BW (Business Warehouse) when you are trying to execute a data extraction or reporting process.
  
  Cause:
  
  Changes in Data Structures: The most common cause of this error is that the data structure of the InfoProvider (like an InfoCube, DataStore Object, or InfoObject) has been modified. This could include changes such as adding or removing fields, changing data types, or modifying key figures.
  Inconsistent Metadata: If the metadata in the BW system is not in sync with the underlying data source (like an SAP ERP system), it can lead to this error.
  Transport Issues: If changes were transported from a development environment to a production environment without proper adjustments, it could lead to inconsistencies.
  
  
  Solution:
  
  Restart the