If while taking a backup from BUSY Agent, some exclusive file is being run, you want to disallow 0 qty in the voucher, then you need to follow the below steps:
Step 1: For this, you need to close the BUSY application, and when you close the BUSY application, all the open forms will close at the time of closing the company, and you can reopen the BUSY issue.
Step 2: Also, make sure no utility is run, just like balance update, rewrite book, etc. If you still issue permission, then you can delete the lock file from the database option in case you access the database.
Step 3: Restart the services of SQL in the case of the SQL database.
Step 4: After the above step, you can take a backup from BUSY Agent; it will take a backup without the error.