foreach my $i0 (0 .. $#copy_conn) {
my $conn = $copy_conn[$i0];
#print "connection $i0 of $nconn/", scalar(@conn), " is $conn\n";
foreach my $i0 (0 .. $#copy_conn) {
my $conn = $copy_conn[$i0];
#print "connection $i0 of $nconn/", scalar(@conn), " is $conn\n";