Hello,

I have troubles with opening some of the .dxf and .dwg files. I use Cad Lib 4.0 and OpenGLExtendedViewExampleCS. When I try to open these files, OpenGLExtendedViewExampleCS always shows black screen. I figured out that GLGraphics3D.CreateDrawables() throws the following exception:

[System.ArgumentOutOfRangeException]

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

at System.Collections.Generic.List`1.get_Item(Int32 index)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.‰.‰(IList`1 polylineA, IList`1 polylineB, Boolean closed)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.‰.‰(Polyline2D polylineA, Polyline2D polylineB, Boolean fill)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.‰.Visit(Polyline2D2WN visitee)jr
at WW.Cad.Drawing.Surface.Polyline2D2WN.Accept(IPrimitiveVisitor visitor)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.Ÿˆ.Draw(›ˆ converter)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.‰.œˆ(›ˆ converter)
at WW.Cad.Drawing.OpenGL.GLGraphics3D.CreateDrawables(ProcessedGraphicElementBlock graphicElementBlock)
at OpenGLExample.GLUtil.InitGLGraphics(GLGraphics3D glGraphics, DxfModel model, Bounds3D bounds, Size2D targetSize) in C:\Users\denis.maslou\Documents\CadLib 4.0\Examples\OpenGLExtendedViewExampleCS\GLUtil.cs:line 86

I have also checked that the WinFormsExtendedViewExampleCS can open these files.

Here you can download the problem dxf file.

I'm looking forward to hearing from you.

Thanks,
Denis.