Child process died unexpectedly. Backup failure. (4046901)

Date - 01/2008
Affected Product & Version - NetVault: Backup 7.4.5
Affected Module & Version - File System Plugin version 7.1.6
OS Version - Windows 2003
Application Information - N/A


Description: Backup failure with Child process died unexpectedly.
Symptoms: Customer is running Incremental backups on a client machine and it abruptly fails with "child process died unexpectedly" errors

Checked status of client in Client management. Found that it is being shown OK.
We could browse the file system plugin and also found that full backups were completing.
I explained to the customer that during the Incremental backups the clients Netvault\tmp directory is accessed and used to complete the backup.

We found that the Clients C drive where netvault was installed only had 65MB of free space.
Customer had free space on his E drive. We uninstalled the current Netvault installation on the C drive and reinstalled the Netvault version on his E drive.