From c61a2d6fcb13d729f3f53a28d6255b6fa52c4047 Mon Sep 17 00:00:00 2001
From: Adrian Mariano <avm4@cornell.edu>
Date: Sun, 24 Oct 2021 10:59:05 -0400
Subject: [PATCH] change err msg

---
 vnf.scad | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vnf.scad b/vnf.scad
index 3d03ae1..fb6f2f9 100644
--- a/vnf.scad
+++ b/vnf.scad
@@ -1255,7 +1255,7 @@ module vnf_debug(vnf, faces=true, vertices=true, opacity=0.5, size=1, convexity=
 //   ], slices=0, caps=false);
 //   vnf_validate(vnf,size=2);
 function vnf_validate(vnf, show_warns=true, check_isects=false) =
-    assert(is_path(vnf[0]))
+    assert(is_vnf(vnf), "Invalid VNF")
     let(
         vnf = vnf_merge(vnf, cleanup=true),
         varr = vnf[0],