'vcbMounter' 1756 error] Error: Backup snapshot already exists. (4043412)

Date: Jun 09
Affected NV Version: All
OS Version: All
Plugin version: 1.0 and up

Description: VM image backup fails with Error: Backup snapshot already exists

Symptom:

Errors such as the following repeatedly appear in the logs:

Information 2009/05/28 15:18:24 0 Data Plugin ATLANTA1 [2009-05-28 15:18:24.314 'vcbMounter' 1756 error] Error: Backup snapshot already exists.
Information 2009/05/28 15:18:24 0 Data Plugin ATLANTA1 [2009-05-28 15:18:24.314 'vcbMounter' 1756 error] An error occurred, cleaning up...

Reason:
a snapshot of the virtual client you are trying to mount a drive on already exists

Right click on the VM Image in question in the Virtual Infrastructure client (Not NetVault), select Snapshot then Snapshot manager and delete the snapshot if still existing here.
Edit the config.js file in $Vmware Consolidated Backup_HOME\config
This needs to be configured with the correct path to the image mount point in the working directory which should look something like as follows. Confirm that the value for BACKUPROOT is the same as the path for the Working Directory as defined in the plugin.

/*
* Directory where all the VM backup jobs are supposed to reside in.
* For each backup job, a directory with a unique name derived from the
* backup type and the VM name will be created here.
* If omitted, BACKUPROOT defaults to c:\\mnt.
*
* Make sure this directory exists before attempting any VM backups.
*/
// BACKUPROOT="E:\VMBwork";

If the configuration is correct run the command vcbCleanup script which resides in the
C:\Program Files\VMware\VMware Consolidated Backup Framework dir.

Check that all files have been removed from the Working Directory.
Upgrade the VMwre plugin to version 2.0 (this requires Netvault 8.5.x to be installed on the machine in question).