Cant create Brep intersection

@catalin wrote:

Hello, I try to use the CreateFromBox method and I cant get breps by doing that. This is part my code:

 Dim bbox = brep.GetBoundingBox(True)
 Dim corner = bbox.GetCorners()

For i = dt To corner(4).Z Step dt
            For j = 0 To 3 Step 1

       cor(j) = corner(j).Z + dt1
  Dim bb As New Rhino.Geometry.BoundingBox(corner(0).X, corner(0).Y, corner(0).Z, corner(j).X, corner(j).Y, cor(j))
  Dim b As New Geometry.Box(bb)
  Dim bbrep = Geometry.Brep.CreateFromBox(b)
  RhinoApp.WriteLine(bbrep.ToString)
  Dim inters As Brep() = Brep.CreateBooleanIntersection(brep, bbrep, 1)

 Next
            dt1 = dt1 + dt
        Next

I get this error: “Value cannot be null.” from Dim inters As Brep() = Brep.CreateBooleanIntersection(brep, bbrep, 1). And RhinoApp.WriteLine(bbrep.ToString) give me “Object reference not set to an instance of an object.”

Can someone tell me how to solve this problem please?
Thanks.

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