Message type: E = Error
Message class:  HRPAYATLZ - Messages for Payslip Functions 
Message number: 015
Message text: No validation rule defined for application &1
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The SAP error message HRPAYATLZ015, which states "No validation rule defined for application &1," typically occurs in the context of payroll processing within the SAP HR module. This error indicates that the system is trying to validate a payroll application (like a payroll run or a specific payroll process) but cannot find a corresponding validation rule defined for that application.
Cause: Missing Validation Rules: The most common cause is that there are no validation rules defined for the specific payroll application in the configuration settings. Incorrect Configuration: The payroll application may not be correctly configured, or the validation rules may not have been set up properly. Custom Development: If there are custom developments or enhancements in the payroll process, they may not have the necessary validation rules implemented.
Solution: Define Validation Rules: Go to the SAP Customizing Implementation Guide (IMG) and navigate to the relevant section for payroll validation rules. Define the necessary validation rules for the specific
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