I recently upgraded from 4.0.35.51 to 4.0.35.91 Now numerous DWG files that used to open fine when I called DwgReader.Read(file), now throw an exception of either: System.ArgumentException {"An item with the same key has already been added."} System.NullReferenceException {"Object reference not set to an instance of an object."} If needed I may be able to provide demo files for these errors, but since the files belong to our clients I would need clearance first. thanks Deane

Stack for exceptions: System.NullReferenceException {"Object reference not set to an instance of an object."} at WW.Cad.Model.Objects.Annotations.DxfHatchScaleContextData..ctor(DxfHatch hatch, DxfScale scale) at WW.Cad.Model.Entities.DxfHatch.CreateContextData(DxfScale s) at WW.Cad.Model.Objects.Annotations.DxfAnnotationScaleObjectContextData. (DxfEntity obj) at WW.Cad.Model.Entities.DxfHatch. () at . . () at WW.Cad.IO.DwgReader.Read(DxfModel model) at WW.Cad.IO.DwgReader.Read() at WW.Cad.IO.DwgReader.Read(String filename, ProgressEventHandler progressEventHandler) at WW.Cad.IO.DwgReader.Read(String filename) System.ArgumentException {"An item with the same key has already been added."} at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value) at WW.Cad.Model.CloneContext.RegisterClone(IGraphCloneable sourceObject, IGraphCloneable clonedObject) at . . () at WW.Cad.IO.DwgReader.Read(DxfModel model) at WW.Cad.IO.DwgReader.Read() at WW.Cad.IO.DwgReader.Read(String filename, ProgressEventHandler progressEventHandler) at WW.Cad.IO.DwgReader.Read(String filename)

Hi, Could you send one of these files to us? Looks like a bug in the annotation scale code (which is partially implemented at the moment, but almost completed). - Wout

I have emailed you a sample file to reproduce the issue.

Hi, We've fixed the issue, can you try the latest CadLib 4.0 version? (4.0.35.92). Thank you for the report! - Wout

Hang on a bit, there is something more wrong. I'm doing some more fixes. - Wout

Ok, I've fixed the other issues that I ran into. Feel free to try the latest CadLib 4.0 version. - Wout

Everything works great now, thanks!