How To Fix RSM1026 - Min/max aggregation used in the update rules; cancellation not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: RSM1 - Messages for AWB, Scheduler and Monitor (new)

• Message number: 026

• Message text: Min/max aggregation used in the update rules; cancellation not possible

What causes this issue?

Minimum / maximum aggregation is used in the update rules, which means
it is not possible to cancel this request (or not useful, as the
minimum/maximum aggregation is not removed when the data is updated
negatively, and, as a result, incorrect data would appear in the
InfoCube).

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?

Delete the request from the InfoCube.
If aggregates exist, it is not possible to delete the InfoCube. If this
is the case, deactivate the aggregate, delete the request from the
InfoCube, and reconstruct the aggregate.
If the request is compressed, it is no longer possible to delete it,
because the request ID is no longer available in the InfoCube, and the
system can no longer identify the data that you want to delete.
The only option is to delete the contents of the InfoCube completely,
and reconstruct the InfoCube from the PSA or the ALE inbound
processing, or to reload the data from the source system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSM1026 - Min/max aggregation used in the update rules; cancellation not possible ?

  The SAP error message RSM1026, which states "Min/max aggregation used in the update rules; cancellation not possible," typically occurs in the context of SAP BW (Business Warehouse) when you are trying to cancel or reverse a data update that involves min/max aggregation in the update rules.
  Cause:
  The error arises because the update rules defined for the InfoObject or InfoProvider are set to use min/max aggregation. In this case, the system does not allow the cancellation of data records because min/max aggregation does not support the reversal of data. This is due to the nature of how min/max aggregation works; it calculates the minimum or maximum value from a set of data, and reversing this operation is not straightforward.
  Solution:
  To resolve this issue, you can consider the following approaches:
  
  
  Check Update Rules: Review the update rules for the InfoObject or InfoProvider in question. If min/max aggregation is not necessary for your reporting needs, consider changing the aggregation type to one that allows for cancellation, such as sum or count.
  
  
  Data Management: If you need to correct or adjust the data, you may need to manually adjust the records in the underlying data source or use a different method to update the data rather than relying on cancellation.
  
  
  Data Re-Load: If the data needs to be corrected, you might need to delete the existing data and reload it with the correct values instead of trying to cancel the update.
  
  
  Consult Documentation: Refer to SAP documentation or consult with your SAP BW administrator for best practices on handling data updates and cancellations, especially when using aggregation functions.
  
  
  Custom Logic: If your business requirements necessitate the use of min/max aggregation, consider implementing custom logic in your data flow to handle updates in a way that aligns with your reporting needs.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error message.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Training and Documentation: Ensure that your team is trained on the implications of using different aggregation types in SAP BW and how they affect data processing.
  
  By understanding the limitations of min/max aggregation and exploring alternative approaches, you can effectively manage and resolve the RSM1026 error in your SAP BW environment.