From 44fb70f22ed11a3406df8b8b9b05e6357f66da23 Mon Sep 17 00:00:00 2001
From: MSV <>
Date: Thu, 28 Apr 2011 15:33:33 +0000
Subject: [PATCH] OCC22400 BndLib_Add3dCurve::Add - protect against void
 bounding box

---
 src/BndLib/BndLib_Add3dCurve.cxx | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/BndLib/BndLib_Add3dCurve.cxx b/src/BndLib/BndLib_Add3dCurve.cxx
index a00ee78f73..271e7783f1 100755
--- a/src/BndLib/BndLib_Add3dCurve.cxx
+++ b/src/BndLib/BndLib_Add3dCurve.cxx
@@ -150,11 +150,14 @@ void BndLib_Add3dCurve::Add( const Adaptor3d_Curve& C,
 	tol = Max(FillBox(B1,GACurve,first,last,N), tol);
 	first = last;
       }
-      B1.Enlarge(weakness*tol);
-      Standard_Real x, y, z, X, Y, Z;
-      B1.Get(x, y, z, X, Y, Z);
-      B.Update(x, y, z, X, Y, Z);
-      B.Enlarge(Tol);
+      if (!B1.IsVoid())
+      {
+        B1.Enlarge(weakness*tol);
+        Standard_Real x, y, z, X, Y, Z;
+        B1.Get(x, y, z, X, Y, Z);
+        B.Update(x, y, z, X, Y, Z);
+        B.Enlarge(Tol);
+      }
       //<-OCC566(apo)
       break;
     }