Hello,
Please do not create any file. While we trigger the backup, there are some files created initially and will not be available later.
Try checking the permissions of
1) Users ( interms of Umask= This should be 022 for sidadm and orasid, Ulimit)
2) Directories ( Sapbackup, saparch and oraarch)
3) brtools ( as mentioned in the previous posts)
It is always advisable that we have latest Kernel/brtools. Check if the backup is happening through
1) brtools
2) DB13
3) brbackup command.
Check if you are able to run only the database backup or only a redo log backup.
Thanks,
Nick