Message type: E = Error
Message class:  HRPSGB_HER - HR PS GB Higher Education Messages (USS, HESA etc) 
Message number: 053
Message text: Processing Totals: Selected. &1 Rejected &2 (Rejected Customer Exit &3)
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The SAP error message HRPSGB_HER053 typically occurs in the context of payroll processing, particularly when dealing with the processing of totals in the SAP HR module. This error indicates that certain records have been rejected during the processing of payroll totals due to a customer exit that has been defined in the system.
Cause: Customer Exit Logic: The error is often caused by custom logic implemented in a customer exit (a user-defined enhancement) that is rejecting certain records based on specific criteria. This could be due to incorrect data, business rules not being met, or other conditions defined in the exit. Data Issues: There may be issues with the data being processed, such as missing or incorrect information in the employee records, payroll results, or other related tables.
Configuration Issues: Incorrect configuration in the payroll schema or related settings can also lead to this error.
Solution: Review Customer Exit: Check the code in the customer exit
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