Index: abstract.c
===================================================================
--- abstract.c	(revision 7614)
+++ abstract.c	(revision 7615)
@@ -138,14 +138,13 @@
 
 	switch(type) {
 		case CSCH_ATYPE_INVALID:
-		case CSCH_ATYPE_NET:
 		case CSCH_ATYPE_BUSNET:
 		case CSCH_ATYPE_BUSCHAN:
-		case CSCH_ATYPE_PORT:
 		case CSCH_ATYPE_BUSPORT:
 		case CSCH_ATYPE_HUB:
 			break;
-
+		case CSCH_ATYPE_PORT: abs->new_ports = 1; break;
+		case CSCH_ATYPE_NET:  abs->new_nets = 1; break;
 		case CSCH_ATYPE_COMP: abs->new_comps = 1; break;
 	}
 }