<p dir="ltr">Hi Colin,<br>
What you are trying to do is live merge - delete a vm's snapshot for running vm.<br>
This feature might not be supported on some of your hypervisors because of vdsm or OS version.<br>
Can you please share the OS version and vdsm vesrion of the hypervisor that hositng the running vm which you cannot delete it's snapshot?</p>
<p dir="ltr">A quick solution is to make sure you powering off a vm before deleting it's snapshot.</p>
<p dir="ltr">Thanks,<br>
Raz Tamir</p>