*** Moved to new discussion from https://vox.veritas.com/t5/NetBackup/Backup-failing-with-error-code-129-Very-often/m-p/562399
Please share how to enable logging level and something related to logs in Netbackup
Please help us understand what your issue is and what you need logging for.
Never a good idea to tag onto a 4-year-old post that was solved.
First step in knowing what logs to enable where (master, media or client) is to understand the process flow.
You can start here: