Veeam Backup error with Event ID: 150 and 190

Situation: The Veeam backup has a problem to backup one of VM with these Event IDs:

Log Name:      Veeam Backup
Event ID:      150
Level:         Error
Description:
VM HSAProcess0708 – W2012R2 task has finished with ‘Failed’ state.
Task details: Failed to get unaccounted changes for disk W2012R2-Test.vhdx. Change tracking is disabled
Error: Snapshot with id ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’ was not found.
–tr:Failed to complete VM backup. Snapshot id: ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’.
Snapshot with id ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’ was not found.

Log Name:      Veeam Backup
Event ID:      190
Description:
Backup job ‘BackupHos02’ finished with Failed.
Job details: Processing HSAProcess0708 – W2012R2 Error: Snapshot with id ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’ was not found.
–tr:Failed to complete VM backup. Snapshot id: ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’.
Snapshot with id ‘{7ee49be4-4ab7-4e0d-ad67-32fa58123b2b}’ was not found.

Possible Cause: The Volume Shadow Copy Service is unable to allocate disk space to create a shadow copy because the maximum size of the shadow storage area is too small.

Solution: Increase the shadow copy storage area for the volume listed in the error event, or set the maximum size to “No limit” by following these steps:

1. Right click any volume and choose Configure Shadow Copies.
2. With the Shadow Copies utility open, select the volume with insufficient space;
3. Click Settings…
4. In the “Maximum size” box, either increase the limit, or choose “No limit”.