The error is
Converter::AtomicVssVolumeSnapshotSet::DeleteSnapshotSet: VSS snapshot failed: Unable to create a snapshot for volume \\.\Volume{c248b111-3281-11e2-8bdf-806e6f6e6963}, \\.\Volume{45086034-802f-11e2-8832-806e6f6e6963}. Error code 2147754760 (0x80042308)
See here for more details:
https://secure.efoldering.com/support/index.php?/Knowledgebase/Article/View/60/6/vss-error-vss_e_object_not_found-0x80042308
HTH
Plamen