An error occurred while taking a snapshot: msg.snapshot.error-QUIESCINGERROR

We are using Veritas NetBackup solution and encounter the above error frequently on our network.

There are multiple causes for this issue and you need to apply separate fix for each issue.

Solution 1 

The first and foremost thing we do is to search the VMware KB. So let's first work through the following article and see if it resolve the issue: https://kb.vmware.com/s/article/2069952

Solution 2 

Root cause : Though VMware snapshot provider service was disabled it was causing backup failure.

Fix : Upgrade VMware tools and remove Volume Shadow Copy Service Support during the upgrade (reboot is not required). This will remove the VMware snapshot provider service from server.

Solution 3

Root cause : Symantec Backup Exec Remote Agent is stopping the Virtual Disk Service

Fix : Un-install Symantec Backup Exec Remote Agent for Windows Systems from Programs and Features.

Cheers!