How to Disable Snapshot in vSphere 6.0 

First, power down the VM with vSphere Web Client, then choose the VM to be adjusted and select Edit Settings. Click Options, General and Configuration Parameters. Click Add Row and then add a line such as:      snapshot.MaxSnapshots – 0   Now click OK to save any changes and power on the VM again This tactic to disable snapshots is reported to work in vSphere 6,but you can't have any snapshot  .

After disabling now again try to create snapshot you will get this error .