Message type: E = Error
Message class:  FAP_BPA_PAYAPPROVAL -  
Message number: 008
Message text: You are not authorized to reject batch &1
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 FAP_BPA_PAYAPPROVAL008 indicates that the user does not have the necessary authorization to reject a specific batch in the payment approval process. This error typically arises in the context of financial processes, particularly when dealing with batch payments that require approval.
Cause: Authorization Issues: The user attempting to reject the batch does not have the required authorization roles or permissions assigned in the SAP system. Role Configuration: The roles assigned to the user may not include the necessary transaction codes or authorization objects related to payment batch processing. User Profile: The user profile may not be set up correctly to allow for rejection of payment batches.
Solution: Check User Authorizations: Verify the user's roles and authorizations using transaction code SU53 immediately after the error occurs. This will show the last authorization check and help identify what is missing. Use transaction code PFCG to review the roles assigned to the user and ensure that the necessary
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FAP_BPA_PAYAPPROVAL007 You are not authorized to approve batch &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FAP_BPA_PAYAPPROVAL006 You are not authorized to view payment batches
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FAP_BPA_PAYAPPROVAL009 You are not authorized to return batch &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FAP_BPA_PAYAPPROVAL010 Payment batch &1 approved
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.