# if we haven't got an explicit via and we can't see them, try their node
unless ($ref || $via) {
my $user = DXUser->get($call);
- $ref = DXCluster->get_exact($user->node);
+ $ref = DXCluster->get_exact($user->node) if $user;
if ($ref) {
$via = $user->node;
push @out, "trying via $via..";