How To Fix RSAU277 - You cannot change units in update type 'Overwrite'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAU - Update rules

• Message number: 277

• Message text: You cannot change units in update type 'Overwrite'

What causes this issue?

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

System Response

How to fix this error?

A change to the unit in the update type 'Overwrite' is only possible
using the selection of another source key figure.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSAU277 - You cannot change units in update type 'Overwrite' ?

  The SAP error message RSAU277, which states "You cannot change units in update type 'Overwrite'," typically occurs in the context of data updates in SAP BW (Business Warehouse) or SAP BI (Business Intelligence) when you are trying to perform an update operation that is not allowed due to the nature of the update type being used.
  Cause:
  The error arises when you attempt to change the units of measure for a characteristic or key figure in an update type that is set to "Overwrite." In SAP BW, the "Overwrite" update type is designed to replace existing data with new data, and it does not allow for changes in the units of measure. This is to maintain data integrity and consistency in the data warehouse.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Check Update Type: Ensure that you are using the correct update type for your data load. If you need to change units, consider using an update type that allows for such changes, such as "Additive" or "Delta" if applicable.
  
  
  Adjust Data Before Loading: If you need to change the units of measure, you may need to preprocess your data before loading it into SAP BW. This could involve converting the units in your source system or in a staging area before the data reaches the BW system.
  
  
  Review Data Source: Check the data source and ensure that the units of measure are consistent with what is expected in the target InfoObject. If there are discrepancies, you may need to adjust the data source or the transformation rules.
  
  
  Consult Documentation: Review the SAP documentation related to data loading and update types to understand the limitations and best practices for handling unit changes.
  
  
  Contact SAP Support: If you are unable to resolve the issue through the above steps, consider reaching out to SAP support for further assistance, especially if this is a recurring issue or if it affects critical business processes.
  
  
  Related Information:
  
  SAP BW/BI Documentation: Review the official SAP documentation for BW/BI regarding data loading and update types.
  Data Modeling: Understanding how data is modeled in SAP BW, including InfoObjects, InfoProviders, and transformations, can help in troubleshooting similar issues.
  Unit of Measure Handling: Familiarize yourself with how units of measure are handled in SAP BW, including any configuration settings that may affect data loading.
  
  By following these steps, you should be able to address the RSAU277 error and successfully manage your data updates in SAP BW.