Netbackup supports maximum file path name of 1023 characters as mentioned in the below technote.
https://www.veritas.com/support/en_US/article.TECH43036

As per the limitation, we cannot take the backups of files with paths exceeding more than 1023 characters. Is there any formula or convention followed to keep the character limit to 1023. One of our servers have a file path more than 1023 characters by having directories inside directories, so how can this be handled.

Technote gave a clarity but would like to know whether there is any other way forward.