Message type: E = Error
Message class:  HRPAYDEMUSCHG_BV - Maternity Protection Act - Prohibited Activities 
Message number: 173
Message text: Calc. of proportional current remuneration liable to SI contributions
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The SAP error message HRPAYDEMUSCHG_BV173, which translates to "Calc. of proportional current remuneration liable to SI contributions," typically arises in the context of payroll processing within the SAP Human Capital Management (HCM) module. This error is related to the calculation of remuneration that is subject to social insurance (SI) contributions, particularly in the context of changes in employment status, such as part-time work, leave, or other adjustments.
Cause: Incorrect Configuration: The error may occur due to incorrect configuration of the payroll schema or rules related to the calculation of remuneration. Missing Data: Required data for the calculation, such as wage types, employee status, or time data, may be missing or incorrectly entered. Inconsistent Data: There may be inconsistencies in the employee master data or infotypes that affect the calculation of remuneration. Legal Changes: Changes in legal regulations regarding social insurance contributions may not be reflected in the system.
Solution: Check Configuration: Review the payroll schema and rules
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