This solution covers the possible reasons why a NetVault:Backup job might fail with the above error messages. It describes how to distinguish between the different possibilities.
A backup job fails and the log shows a message "Fatal error processing children of 'xxx'" or "Fatal error writing backed up data"
Often, this error is accompanied by a "Channel Error" further down in the log.
Double-clicking on the exclamation mark next to it will reveal the embedded trace.
Scroll to the very bottom of it and identify the last message logged.
If it reads "Channel at 00000000 active FALSE", then it is most likely that the data channel (which we had successfully established earlier) has been terminated.
This is the real reason why the plugin failed to write the data to the targeted device.This could be due to a network issue outside of NetVault.
Check whether this happens consistently or intermittently and identify and resolve the problem with your network.
In rare circumstances, the above error messages can also occur when NetVault cannot process a file due to permissions issues. Normally, someone else has taken ownership of a folder or file, and removed the Administrator, or taken away full permissions from the Administrator.
Administrator or root user must have full permissions on all files / directories being backed up.
Finally, there are particular instances in Solaris with the /etc/mnttab file or Linux when /proc has been selected in the backup where our plugin is unable to access these OS reserved files and fails with this error.
