How To Fix DT342 - & and proxy object & have different numbers of columns

DT342 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 342

• Message text: & and proxy object & have different numbers of columns

Self-Explanatory Message

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DT342 - Details

• The SAP error message DT342 typically indicates a mismatch in the number of columns between a data source and a proxy object in a data transfer process. This can occur in various contexts, such as when working with Data Transfer Processes (DTPs), DataSources, or when using SAP BW (Business Warehouse) and SAP HANA.
  
  Cause:
  
  
  Mismatch in Structure: The most common cause of this error is that the structure of the data source (e.g., InfoSource, DataSource, or DSO) does not match the structure of the target object (e.g., InfoObject, DSO, or InfoCube). This can happen if:
  
  Columns have been added or removed from the source or target.
  The data types of the columns do not match.
  The order of the columns is different.
  
  
  
  Changes in Data Model: If there have been recent changes to the data model, such as modifications to the DataSource or the target object, this can lead to discrepancies.
  
  
  Incorrect Mapping: If the mapping between