Hi,

Calling gvpr's delete() apparently stops processing of nodes.

a.dot:
digraph cd {
 a
 b
}

$gvpr -c 'N { printf("%s\n", $.name); delete($G, $) }' a.dot
a
digraph cd {
     b;
}

OTOH:

$gvpr -c 'N { printf("%s\n", $.name) }' a.dot
a
b
digraph cd {
     a;
     b;
}