Scheduled backup job failed

Hi,

I have vshpere 5 with iscsi attached storage. I recently installed vmprotect 8. It ran for two weeks without error. However, over the last 7 days, I have two failed jobs (different VMs). When I start the job manually, it worked. I'm wonder what is the cause. Please find the following the last failed job.

Note: the job backup two VMs. It was success on first VM. However, failed on second.

Thanks,
Aldous

===== Job Log Below =====
Backup has failed. Please check the log for additional information.
1 Information 12/12/12 11:30:01 PM Task 'Terminal Servers Backup (BTIRDS01, BTITS) - Not Validated' changed its state from 'idle' to 'running'.
2 Information 12/12/12 11:30:01 PM Task 'Terminal Servers Backup (BTIRDS01, BTITS) - Not Validated' was started.
3 Information 12/12/12 11:30:03 PM Backing up VM(s).
4 Information 12/12/12 11:30:03 PM Successfully connected to 'VMware vCenter Server 5.0.0 build-455964'.
5 Information 12/12/12 11:30:03 PM Successfully connected to 'VMware ESXi 5.0.0 build-474610' through VMware vCenter Server.
6 Information 12/12/12 11:30:04 PM Successfully connected to 'VMware ESXi 5.0.0 build-474610' through VMware vCenter Server.
7 Information 12/12/12 11:30:04 PM Successfully connected to 'VMware vCenter Server 5.0.0 build-455964'.
8 Information 12/12/12 11:30:06 PM Successfully connected to 'VMware vCenter Server 5.0.0 build-455964'.
9 Information 12/12/12 11:30:08 PM Successfully connected to 'VMware vCenter Server 5.0.0 build-455964'.
10 Information 12/12/12 11:30:08 PM Successfully connected to 'VMware ESXi 5.0.0 build-474610' through VMware vCenter Server.
11 Information 12/12/12 11:30:51 PM Creating snapshot (12/12/12 11:30:09 PM).
12 Information 12/12/12 11:30:51 PM Successfully connected to 'VMware ESXi 5.0.0 build-474610' through VMware vCenter Server.
13 Information 12/12/12 11:30:51 PM Load virtual machine 'vm://F617E545-7391-4C8D-9B42-CE0CB63E513B/5015cbb7-8b2e-ca62-1cde-c07f7442e31b?host=host-9&type=vmwesx' into the disk subsystem.
14 Information 12/12/12 11:30:51 PM Adding virtual hard disk '[iScsiStore1] BTIRDS01/BTIRDS01-000002.vmdk' to '1:1'.
15 Information 12/12/12 11:30:57 PM Analyzing partition 'C:'...
16 Information 12/12/12 11:30:58 PM Analyzing partition 'D:'...
17 Information 12/12/12 11:30:58 PM Analyzing partition '1-0'...
18 Information 12/12/12 11:31:16 PM Create Incremental Backup From: Disk '1' To file: "avfs:/smb?//btibackup01/Acronis%20vmProtect%20Backups/Terminal%20Servers.TIB" Password protected Compression: Normal Exclude: Files matching mask Match criterion:
19 Information 12/12/12 11:31:17 PM Backing up additional file 'BTIRDS01-000001.vmdk'.
20 Information 12/12/12 11:31:18 PM Backing up additional file 'BTIRDS01-000002.vmdk'.
21 Information 12/12/12 11:31:18 PM Backing up additional file 'BTIRDS01.nvram'.
22 Information 12/12/12 11:31:19 PM Backing up additional file 'BTIRDS01.vmdk'.
23 Information 12/12/12 11:31:20 PM Backing up additional file 'BTIRDS01.vmx'.
24 Information 12/12/12 11:31:20 PM Backing up additional file 'BTIRDS01.vmxf'.
25 Information 12/12/12 11:31:21 PM Backing up additional file 'vss_manifests.zip'.
26 Information 12/12/12 11:31:24 PM Pending operation 153 started: 'Creating partition image'.
27 Information 12/12/12 11:31:24 PM CBT (Changed Block Tracking) information has been successfully retrieved.
28 Information 12/12/12 11:31:29 PM Pending operation 153 started: 'Creating partition image'.
29 Information 12/12/12 11:31:46 PM CBT (Changed Block Tracking) information has been successfully retrieved.
30 Information 12/12/12 11:32:07 PM Pending operation 150 started: 'Saving partition structure'.
31 Information 12/12/12 11:32:12 PM Detaching hard disk 'SCSI1:1'.
32 Information 12/12/12 11:32:18 PM Remove snapshot (snapshot-2056).
33 Information 12/12/12 11:32:18 PM Successfully connected to 'VMware vCenter Server 5.0.0 build-455964'.
34 Information 12/12/12 11:32:18 PM Successfully connected to 'VMware ESXi 5.0.0 build-474610' through VMware vCenter Server.
35 Error 12/12/12 11:33:01 PM Failed to perform the requested operation.
Additional info:
--------------------
Error code: 13
Module: 149
LineInfo: d1ab7fa1e56ec9b9
Fields:
Message: Failed to perform the requested operation.
--------------------
Error code: 103
Module: 83
LineInfo: a859dd78cc91defd
Fields:
Message: Failed to open the virtual machine ([iScsiStore1] Remote Desktop (BTITS)/Remote Desktop (BTITS).vmx).
--------------------
Error code: 253
Module: 83
LineInfo: c7610e0a857bedf4
Fields:
Message: VMware error: 'Remote method call failed.'.
--------------------
Error code: 32
Module: 0
LineInfo: c7610e0a857bedf4
Fields:
Message: Awaiting task 'CreateSnapshot' has failed. Reason: An error occurred while quiescing the virtual machine. See the virtual machine's event log for details..
--------------------
36 Information 12/12/12 11:33:03 PM Task 'Terminal Servers Backup (BTIRDS01, BTITS) - Not Validated' changed its state from 'running' to 'idle'.
37 Error 12/12/12 11:33:03 PM Task 'Terminal Servers Backup (BTIRDS01, BTITS) - Not Validated' failed: 'Failed to create a backup.
Additional info:
--------------------
Error code: 3
Module: 435
LineInfo: 555b5abba09501ce
Fields:
Message: Failed to create a backup.
--------------------
Error code: 32786
Module: 114
LineInfo: 28314c961de7d32e
Fields:
Message: Failed to prepare for backing up.
--------------------
Error code: 353
Module: 149
LineInfo: a71592046cb2c5f6
Fields:
Message: Failed to back up the group.
--------------------
Error code: 2
Module: 218
LineInfo: 338a407ad20e0987
Fields:
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 1080
Module: 1
LineInfo: d1ab7fa1e56ec832
Fields:
Message:
--------------------
Error code: 13
Module: 149
LineInfo: d1ab7fa1e56ec9b9
Fields:
Message: Failed to perform the requested operation.
--------------------
Error code: 103
Module: 83
LineInfo: a859dd78cc91defd
Fields:
Message: Failed to open the virtual machine ([iScsiStore1] Remote Desktop (BTITS)/Remote Desktop (BTITS).vmx).
--------------------
Error code: 253
Module: 83
LineInfo: c7610e0a857bedf4
Fields:
Message: VMware error: 'Remote method call failed.'.
--------------------
Error code: 32
Module: 0
LineInfo: c7610e0a857bedf4
Fields:
Message: Awaiting task 'CreateSnapshot' has failed. Reason: An error occurred while quiescing the virtual machine. See the virtual machine's event log for details..
--------------------'.