Message type: E = Error
Message class:  HRPAYAT_ELDA - Messages for ELDA File Creation 
Message number: 015
Message text: No active BAdI implementation for determining data medium number
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The SAP error message HRPAYAT_ELDA015 indicates that there is no active Business Add-In (BAdI) implementation for determining the data medium number in the context of payroll processing. This error typically arises when the system is trying to generate a data medium for payroll but cannot find the necessary implementation to handle this process.
Cause: Missing BAdI Implementation: The most common cause of this error is that the required BAdI implementation for the payroll data medium is not activated in the system.
Configuration Issues: There may be configuration issues in the payroll settings that prevent the system from determining the data medium number. Transport Issues: If the BAdI implementation was recently transported from another system, it may not have been activated in the target system.
Solution: Activate the BAdI Implementation: Go to transaction code SE19 (BAdI Implementation). Check if there is an implementation for the BAdI HR_PAY_AT_DATA_MEDIUM. If it is not active, you can create a new implementation or activate
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