Backup exec 2014 Job fails with the following error

Hi,

I hope somebody can help me with this. We had an error today from our backup. Cant find much info about this.

Job ended: woensdag 1 oktober 2014 at 13:33:41
Completed status: Failed
Final error: 0xe000fe0b - An operation was attempted on an object that was not opened.
Final error category: Job Errors
 

and the actual error states:

Verify- VMVCB::\\W2K8BCK1\VCGuestVm\(DC)Technex Datacenter(DC)\vm\Productie LAN\SBSSRV1 (SBS2011)
Data for VMVCB::\\W2K8BCK1\VCGuestVm\(DC)Technex Datacenter(DC)\vm\Productie LAN\SBSSRV1 (SBS2011)\SBSSRV1 (SBS2011)\SBSSRV1 (SBS2011)_2.vmdk is corrupt.

where the SBS2011 is our small business server(domain, exchange, data) i cant find any info as to why this error appeared.