Message type: E = Error
Message class:  HRPAYSI - Messages for Function Group HR_INFOTYPE8_PAYROLL 
Message number: 021
Message text: Input parameter was not specified
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The SAP error message HRPAYSI021, which states "Input parameter was not specified," typically occurs in the context of payroll processing or when executing specific functions related to HR (Human Resources) and payroll systems. This error indicates that a required input parameter for a function or report has not been provided, leading to the failure of the operation. Causes: Missing Input Parameters: The most common cause is that a required field or parameter has not been filled out in the transaction or report you are trying to execute.
Configuration Issues: There may be issues with the configuration of the payroll schema or the specific function module being called. Custom Development: If there are custom programs or enhancements, they may not be handling input parameters correctly. User Authorization: Sometimes, the user may not have the necessary authorizations to access certain parameters or data. Solutions: Check Input Fields: Review the transaction or report you are executing and ensure that all
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