vm may be too busy to quiesce to take the snaphot. BE2012

[S_anshu]

Can anyone provide me the solution for it?

[pkh]

1) If you are not on SP2, then upgrade to SP2

Backup Exec 2012 revision 1798 Service Pack 2

http://www.symantec.com/docs/TECH203155

2) Are you using a free version of ESX?  If so, then you need to get a paid version because BE requires the vStorage API which only comes with a paid version.

[Kunal_Mudliyar1]

If you follow this article you should be able be able to fix this issue

How to troubleshoot virtual machine VSS snapshot and quiesce issues during VMware backups.

Article : http://www.symantec.com/docs/TECH129724