Message type: E = Error
Message class:  HRPIQ00ACCOUNTING - Campus Management - Student Accounting 
Message number: 303
Message text: Enter a student number
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 HRPIQ00ACCOUNTING303, which prompts "Enter a student number," typically occurs in the context of SAP's Student Lifecycle Management (SLCM) or similar modules where student data is managed. This error indicates that a required field, specifically the student number, has not been filled in or is missing when trying to execute a transaction or process related to student accounting.
Cause: Missing Input: The most common cause is that the user has not entered a student number in the relevant field before attempting to process the transaction. Incorrect Configuration: There may be configuration settings in the SAP system that require a student number for certain transactions, and these settings may not be properly aligned with the business process. User Role/Authorization: The user may not have the necessary permissions to access or view student records, leading to the inability to enter or retrieve a student number.
Solution: Enter Student Number: The immediate solution is to ensure
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPIQ00ACCOUNTING302 Contract account &1 does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING301 Student with student number &1 already exists as business partner &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING304 Business partner &1 and contract account &2 were created
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00ACCOUNTING305 No grants found for business partner &1
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.