Hi, When we try to open a specific dwg file, we get the following error message: Cannot determine spline interpolation! I will send you the dwg file by email. Here is the stack trace that we get: at WW.Cad.Model.Entities.DxfSpline.(KnotParameterization , IList`1 ) at WW.Cad.Model.Entities.DxfSpline.() at WW.Cad.Model.Entities.DxfSpline.() at WW.Cad.Model.Entities.DxfSpline.(Int32 ) at WW.Cad.Model.Entities.DxfSpline.(DrawContext , ILineTypeScaler , IList`1& , List`1& ) at WW.Cad.Model.Entities.DxfSpline.DrawInternal(Wireframe context, IWireframeGraphicsFactory graphicsFactory) at WW.Cad.Model.Entities.DxfEntity.Draw(Wireframe context, IWireframeGraphicsFactory graphicsFactory) at WW.Cad.Drawing.BoundsCalculator.GetBounds(DxfModel model, Matrix4D modelTransform) at WW.Cad.Drawing.BoundsCalculator.GetBounds(DxfModel model) at WW.Cad.Model.DxfModel.(Boolean ) at WW.Cad.IO.DwgReader.Read(DxfModel model) at WW.Cad.IO.DwgReader.Read() at WW.Cad.IO.DwgReader.Read(String filename, ProgressEventHandler progressEventHandler)

Hi, The problem has been fixed, please download the latest version from Your resources if your license is still valid. Thank you for the report! - Wout

Thank you :)