Message type: E = Error
Message class:  EPIC_ACTIONS - Messages for Payment Processing Services 
Message number: 407
Message text: Payment files could not be sent, not all items could be locked
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 EPIC_ACTIONS407 indicates that there was an issue with sending payment files because not all items could be locked. This typically occurs in the context of payment processing, where the system attempts to lock certain items (like invoices or payment requests) to ensure that they are not modified while the payment file is being generated or sent. Causes: Concurrency Issues: Another user or process may be accessing or modifying the same items that the system is trying to lock, leading to a failure in locking all required items. Database Locking: The database may have reached its limit for locks, or there may be a deadlock situation.
Configuration Issues: There may be configuration settings in the payment processing module that are not set correctly. System Performance: If the system is under heavy load, it may struggle to lock items in a timely manner. Solutions: Check for Concurrent Access: Ensure that no other users or processes
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
EPIC_ACTIONS406 Response message from bank cannot be processed
What causes this issue?  After you sent an outgoing payment file to your bank, the system received an automatic response message from your bank. Howev...
EPIC_ACTIONS405 Payment file not found
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
EPIC_ACTIONS408 One or more corresponding items are missing or in wrong status.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
EPIC_ACTIONS421 Status of &1 items updated successfully
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.