Message type: E = Error
Message class:  HRPIQ000RULES - Messages for CM Rules 
Message number: 120
Message text: Technical error: Student ID for message control BAdI has initial value
You have not specified the required student ID for a function module.
The student ID is an optional parameter in regular function modules.
However, when you use a customer enhancement (
<DS:GLOS.5C733369F735D311AE620060B03C9BBE>BAdI</>) for message control,
the student ID is a mandatory parameter.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message HRPIQ000RULES120 typically indicates that there is a technical error related to the processing of student data in the SAP system, specifically when using the Business Add-In (BAdI) for message control. The error message suggests that the Student ID being processed has an initial (or empty) value, which is causing the system to fail in executing the intended logic.
Cause: Missing Student ID: The most common cause of this error is that the Student ID is not being populated correctly in the relevant data structure or context before the BAdI is called. Data Entry Issues: There may be issues with data entry or data migration where the Student ID was not provided or was incorrectly set to an initial value.
Configuration Issues: There could be configuration issues in the BAdI implementation that do not handle cases where the Student ID is not available. Custom Code Issues: If there is custom code associated
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