$lockfn = "$root/local/cluster.lck"; # lock file name
if (-e $lockfn) {
open(CLLOCK, "$lockfn") or die "Can't open Lockfile ($lockfn) $!";
$lockfn = "$root/local/cluster.lck"; # lock file name
if (-e $lockfn) {
open(CLLOCK, "$lockfn") or die "Can't open Lockfile ($lockfn) $!";