Exit Code -311 occurs when backing up more than 65 volumes with a single task

Summary

If you include more than 65 volumes when backing up with one schedule, Exit Code -311 will occur and the backup will 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 was not added to 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

Set the number of volumes for the backup to included in one schedule to 64 or less.

Target Products

– ActiveImage Protector 2016 / 2016R2 / 2018 Windows