Failed to Backup VM - Failed to retrieve next FILE_PUT message

Hi All,

I just got problem in my environment. Here it is:

Before, the VM was backup normally during last 1 year. But, last week, the backup was failed. Here is failed notification:

Processing SERVER-A (1xx.1xx) Error: DiskLib error: [4].Success Failed to retrieve next FILE_PUT message. File path: [[datastore_name] SERVER-A/SERVER-A.vmx]. File pointer: [0]. File size: [3338].

My Environment Info:

VM Os               : Windows Server 2003

VMware Esxi      : 5.5

Vcenter Version  : 6.0

Backup App        : Veeam B&R

Additional Information : backup job for other VM's run normally

Why this error happen? What to do to fix this issue?

any suggestion will be appreciated.

Best Regards,

Azlan Syah