SAP Message AY428 - Errors or warnings on distribution or detail screen due to validation

Diagnosis
Validations (user-defined checks) were entered in Customizing for themaintenance of asset master data. The depreciation simulation data alsohas to satisfy these validation checks. However, when the checks werecarried out, the system issued warnings or error messages. The causecan be on the distribution screen as well as on the detail screen.

Procedure
When you confirm this message by choosing 'Enter' you receive adetailed error list. Check the data using this list and make thenecessary corrections.