How To Fix NRSCNV405 - Changing the time dimension is not allowed for NCUM DataStore objects

SAP Error Message - Details

• Message type: E = Error

• Message class: NRSCNV - Message class

• Message number: 405

• Message text: Changing the time dimension is not allowed for NCUM DataStore objects

What causes this issue?

You are trying to modify the time dimension of a DataStore object that
contains non-cumulative key figures. This is not allowed, as it would
result in inconsistent time values.

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?

Remove any operations that make changes to the time dimension from the
remodeling rule.

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 NRSCNV405 - Changing the time dimension is not allowed for NCUM DataStore objects ?

  The SAP error message NRSCNV405 indicates that there is an attempt to change the time dimension of a Non-Changeable (NCUM) DataStore Object (DSO). In SAP BW (Business Warehouse), NCUM DSOs are designed to store data that is not meant to be changed or updated after it has been loaded. This is particularly relevant for scenarios where historical data integrity is crucial, such as financial reporting.
  Cause:
  The error occurs when a user tries to modify the time characteristics (like the time dimension) of an NCUM DSO. This is not allowed because NCUM DSOs are intended to maintain a fixed structure once they are created, ensuring that the historical data remains consistent and unaltered.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review Requirements: Determine if changing the time dimension is absolutely necessary. If the current structure meets your reporting and data analysis needs, it may be best to leave it as is.
  
  
  Create a New DSO: If you need a different time dimension, consider creating a new NCUM DSO with the desired time characteristics. You can then load data into this new DSO as needed.
  
  
  Data Migration: If you have existing data in the old DSO that needs to be migrated to the new one, plan a data migration strategy. This may involve extracting data from the old DSO and loading it into the new one.
  
  
  Consult Documentation: Review SAP documentation or consult with your SAP BW administrator for best practices regarding the design and use of NCUM DSOs.
  
  
  Check for Dependencies: Ensure that there are no dependencies or processes that rely on the current DSO structure before making changes.
  
  
  Related Information:
  
  NCUM DSO Characteristics: Understand the characteristics of NCUM DSOs, including their purpose and limitations.
  Data Modeling in SAP BW: Familiarize yourself with data modeling concepts in SAP BW, including the differences between various types of DSOs (e.g., standard, write-optimized, and NCUM).
  SAP Notes and Community: Check SAP Notes for any updates or specific guidance related to this error message. The SAP Community forums can also be a valuable resource for troubleshooting and best practices.
  
  By following these steps, you should be able to address the NRSCNV405 error effectively while maintaining the integrity of your data warehouse.