I'm trying to get the VMware image backups working...

And in fact, if I shut down the VM I'm trying to back up, it works just fine.

However, if the VM is running, I get errors in vSphere saying it's unable access vmname/vmname.vmx... and also vmname/vmname.nvram

Then it fails. The Activity log in the avamar administrator shows "Cancelled" and "10013" as the error code.

I tried manually copying this file to another location on the same datastore using the vSphere client, and it also fails with the same error (in vSphere)... "unable to access file..."

If I manually snapshot a VM using the vSphere client, the snapshot works just fine.

Any help on this would be appreciated.