Message type: E = Error
Message class:  HRPIQ00REGIST - Messages Related to Registration 
Message number: 013
Message text: Sessional registration is already cancelled
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.
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The SAP error message HRPIQ00REGIST013 indicates that a session registration has already been canceled. This error typically occurs in the context of SAP's Human Capital Management (HCM) module, particularly when dealing with employee training and event management.
Cause: The error can arise due to several reasons: Duplicate Cancellation: The session registration was already canceled previously, and an attempt is being made to cancel it again. Incorrect Status: The system may be trying to process a registration that is already in a canceled state. User Error: The user may have mistakenly attempted to cancel a registration that was already inactive.
Solution: To resolve this error, you can take the following steps: Check Registration Status: Verify the current status of the session registration in the system. Ensure that it is indeed in a canceled state. You can do this by navigating to the relevant transaction in SAP (e.g., using transaction codes like HRPIQ00 or HRPIQ00REGIST). Avoid Duplicate Actions: If the registration is already canceled,
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