Exit Code -311 indicates an error occurring when attempting to back up more than 65 volumes in a single task

Summary

If you back up more than 65 volumes using one schedule, Exit Code -311 will trigger, causing the backup to fail.

— log excerpt —
06/06/2018 01:33:23.614 VssStart() 06/06/2018 01:33:23.720 Using Common Provider
06/06/2018 01:33:46.523 COM Error(0x80042312): m_pVssObject->AddToSnapshotSet((LPWSTR)volume.c_str(), providerID, &SnapshotID)
06/06/2018 01:33:46.557 [06/05/2018 18:33:46.461] OUTPUT: – Error text: VSS_E_MAXIMUM_NUMBER_OF_VOLUMES_REACHED
—————-

VSS_E_MAXIMUM_NUMBER_OF_VOLUMES_REACHED (0x80042312):
The specified volume or remote file share wasn't included in the shadow copy set.

Cause

This is because the maximum number of volumes that can be included in the shadow copy set has been reached.

Workaround

Limit the number of volumes included in one backup schedule to 64 or fewer.

Target Products

– ActiveImage Protector 2016 / 2016R2 / 2018 Windows

(13451080231961)