How To Fix CN480 - Work data changed, calculation key set to manual

CN480 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 480

• Message text: Work data changed, calculation key set to manual

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?

Error message extract from SAP system. Copyright SAP SE.

CN480 - Details

• The SAP error message CN480 ("Work data changed, calculation key set to manual") typically occurs in the context of project management and cost planning within the SAP system, particularly when dealing with network activities or project structures. This message indicates that the system has detected changes in the work data (such as planned costs, work hours, or other relevant parameters) that affect the calculation of costs or other metrics.
  
  Cause:
  
  Data Changes: The most common cause of this error is that the work data for a project or network activity has been modified after the initial calculations were performed. This could be due to manual updates, changes in resource assignments, or adjustments in planned costs.
  Automatic Calculation Disabled: When the system detects changes, it may switch the calculation method to manual to prevent automatic recalculations that could lead to inconsistencies or errors in the data.
  User Actions: Users may have manually changed certain fields