Peter,
Better late than never, right? Those cmdlets relate to lun clone operations in progress or failed lun clone operations. Is that what you're after, or are you trying to find volume clones?
If you're after vol clones, you could adapt this to your script:
$volstats = get-NaVol
foreach ($vol in $volstats) {
if ($vol.CloneChildren -ne $null) {
write-Host "Volumes with clones:"
write-Host $vol.CloneChildren
}
}
I hope that helps.