Index: map_2nets.h
===================================================================
--- map_2nets.h	(revision 35114)
+++ map_2nets.h	(revision 35115)
@@ -81,6 +81,7 @@
 	pcb_2netmap_control_t ctrl;
 	pcb_2netmap_oseg_t *osegs; /* output: head of a singly linked list */
 	unsigned find_rats:1;      /* config: set to 1 if rats shall be included */
+	unsigned find_floating:1;  /* include free floating nets that are not connected to any terminal */
 
 	/* internal */
 	htpp_t o2n;   /* of (pcb_2netmap_iseg_t *); tells the net for an object */
Index: map_2nets_map.c
===================================================================
--- map_2nets_map.c	(revision 35114)
+++ map_2nets_map.c	(revision 35115)
@@ -439,7 +439,9 @@
 		if (i->used) continue;
 		if (i->term[0] && i->term[1]) /* simplest case: terminal-to-terminal */
 			map_seg_out(map, i);
-		else if (i->term[0] || i->term[1])
+		else if (i->term[0] || i->term[1]) /* at least one end has termianl */
 			map_seg_search(map, i);
+		else if (map->find_floating) /* caller wants to see free floating nets */
+			map_seg_search(map, i);
 	}
 }