Error with scheduled backup jobs.

Hello All,

Recently I have encountered this error:
This happens when the backup job is run on scheduled basis.

When I perform a manual backup. eg: Log on to the server. Start the job manually, it works.
If I log off and when it runs on schedule basis, this error occurs.

I am using Acronis Backup & Recovery 10 Update 3 build 10.0.12497.
This is a critical server and its not a good choice to update Acronis.

Can anyone help please? Thanks in advance.

-Edit- By the way even it says not enough storage, my hard disk space is plenty. Like above 500GB.

Error occurred while running the backup and recovery engine.
Additional info:
--------------------
Error code: 2
Module: 218
LineInfo: 600f7166ce397df5
Fields: $module : C:\Program Files (x86)\Acronis\BackupAndRecovery\mms.exe
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 502
Module: 1
LineInfo: a164035b3ff39281
Fields: $module : C:\Program Files (x86)\Common Files\Acronis\BackupAndRecoveryAgent\BackupAndRecoveryService.exe
Message: Operation with partition '0-0' was terminated.
Details:
Read error.

Error code: 0x70003
Tag: 0xDF81DA2C74EC501D
Failed to read the snapshot.

Error code: 0x10C45A
Tag: 0x14181C22EF45AD46
Not enough storage is available to process this command

Error code: 0xFFF0
code = 2,147,942,408 (0x80070008)
Tag: 0xBD28FDBD64EDB8BC
--------------------
Error code: 3
Module: 7
LineInfo: df81da2c74ec501d
Fields:
Message: Read error
--------------------
Error code: 50266
Module: 16
LineInfo: 14181c22ef45ad46
Fields:
Message: Failed to read the snapshot.
--------------------
Error code: 65520
Module: 0
LineInfo: bd28fdbd64edb8bc
Fields: code : 2147942408
Message: Not enough storage is available to process this command
--------------------