How To Fix AREN210 - &1: Projection and header table contain the same fields (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: AREN - Messages - Archiving Engine

• Message number: 210

• Message text: &1: Projection and header table contain the same fields (see long text)

What causes this issue?

The projection for selection contains all fields from the header table.
This can affect performance.

System Response

Message, if all fields from the header table are read in the analysis
phase in the Archiving Engine.
This message is not an error, but informs you of the potential for
optimization.

How to fix this error?

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

Check if the number of fields to be read from the header table can be
reduced.
Check if the number of fields to be read in &V2& can be reduced to a
real subset of fields (header table).
Fields that are not relevant for the business check, the add-on
calculation, scheduling, or residence time determination should be
removed from the structure.
Only a reduction in fields results in a real data projection to the
header table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AREN210 - &1: Projection and header table contain the same fields (see long text) ?

  The SAP error message AREN210 indicates that there is a conflict between the projection and the header table in terms of the fields they contain. This typically occurs in the context of data modeling or when working with database views, where the projection (the set of fields you want to retrieve) and the header table (the main table from which data is being pulled) are not aligned correctly.
  Cause:
  The error arises when the projection and the header table are defined to include the same fields, which can lead to ambiguity in data retrieval. This situation can occur due to:
  
  Incorrect Data Model Design: The projection may have been incorrectly defined to include fields that are already present in the header table.
  Changes in Table Structure: If the structure of the header table has changed (e.g., fields added or removed), the projection may not have been updated accordingly.
  Misconfiguration: There may be a misconfiguration in the data extraction or reporting setup that leads to this conflict.
  
  Solution:
  To resolve the AREN210 error, you can take the following steps:
  
  
  Review the Projection and Header Table:
  
  Check the fields defined in both the projection and the header table.
  Identify any overlapping fields that are causing the conflict.
  
  
  
  Modify the Projection:
  
  Remove the fields from the projection that are already present in the header table.
  Ensure that the projection only includes fields that are necessary and not duplicated.
  
  
  
  Update Data Model:
  
  If there have been changes to the header table, ensure that the projection is updated to reflect these changes.
  Validate the data model to ensure that it adheres to best practices and does not contain redundant fields.
  
  
  
  Test the Changes:
  
  After making the necessary adjustments, test the data retrieval process to ensure that the error no longer occurs.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on data modeling and projections to ensure compliance with SAP standards.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  Data Dictionary: Familiarize yourself with the data dictionary in SAP to understand the relationships between tables and fields.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the AREN210 error and ensure that your data model is correctly configured.