Message type: E = Error
Message class:  HRPIQ00ACCOUNTING - Campus Management - Student Accounting 
Message number: 500
Message text: You must enter an object ID for the student
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message HRPIQ00ACCOUNTING500 ("You must enter an object ID for the student") typically occurs in the context of SAP's Human Capital Management (HCM) module, particularly when dealing with student-related data in the SAP Student Lifecycle Management (SLCM) or similar applications.
Cause:
This error usually arises when a user attempts to process or record information related to a student (such as financial transactions, accounting entries, or other administrative tasks) without providing a necessary identifier for the student, known as the "object ID." The object ID is crucial for linking the transaction to the specific student record in the system.
Solution:
To resolve this error, you should ensure that the following steps are taken:
Check Input Fields: Verify that the field for the object ID (student ID) is filled in correctly. Ensure that you are entering a valid student ID that exists in the system.
Data Entry: If you are entering data manually, double-check for any Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPIQ00ACCOUNTING451 Update cannot be performed for student &1 because (s)he is locked
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING450 Use the report program only for the upgrade (see program documentation)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING501 Student &1 does not exist in plan version &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING502 Student number for object ID &1 in plan version &2 is incorrect
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.