Backup Exec 15- VSS Snapshot Error

Hi All

Encounter this problem,

once the backup from incremental run this will be the result.

I also checked  that the source disk and all disks hosting Shadow Copy Storage Locations are accessible, and are showing as healthy in Disk Manager on the server being backed up.

also run the  vssadmin list writers  and vssadmin list shadows  and the result is stable and no error.

can anyone help me to fix this.

other details

Windows server 2008 std 64bit

Ms Sql Server 2012 64bit

Backup
 - Snapshot Technology: Initialization failure on: "QUOTATIONS.ORIX.LOCAL\MSSQLSERVER". Snapshot technology used: Microsoft Volume Shadow Copy Service (VSS).
V-79-10000-11219 - VSS Snapshot error. The volume or snapped volume may not be available or may not exist. Check the configuration of the snapshot technology, and then run the job again.

job ended: Tuesday, March 21, 2017 at 6:16:32 AM
Completed status: Failed
Final error: 0x80042308 - 0x80042308 (2147754760)
Final error category: Other Errors

For additional information regarding this error refer to link V-79-32772-8968

Database msdb is in simple recovery mode. Excluding it from Log backup job.
Running a full backup of database 'QUOTAS' on SQL Server 'SERVER NAME' because either a full backup does not exist or the last full backup was not run by Backup Exec.
Running a full backup on database 'master' on SQL Server 'SERVER NAME' because only full backups are supported on this system database.
Running a full backup on database 'model' on SQL Server 'SERVER NAME' because block level backups are not supported on system databases.
Running a full backup on database 'msdb' on SQL Server 'SERVER NAME' because block level backups are not supported on system databases.
Backup Exec server is running Backup Exec version 14.1.1786.1103 with SP-2,HF-227745.