AddClone(slideEx- destinationPresentationEx.Masters[index]); leads to Internal cloning error: loaded document found. Path = \"/ppt/drawings/vmlDrawing1.vml\"."

Hallo,

since updating to 3.1.0 we have re-run unit tests that previously passed. Now they fail, and this occurs on calling the following method:

AddClone(slideEx, destinationPresentationEx.Masters[index]);

it fires an error: Internal cloning error: loaded document found. Path = “/ppt/drawings/vmlDrawing1.vml”."

Stack Trace:

at Aspose.Slides.Pptx.PresentationEx.(BaseSlideEx )
at Aspose.Slides.Pptx.SlidesEx.(SlideEx , LayoutSlideEx )
at Aspose.Slides.Pptx.SlidesEx.(SlideEx , MasterSlideEx )
at Aspose.Slides.Pptx.SlidesEx.AddClone(SlideEx slide, MasterSlideEx master)

I shall add the source file we were cloning that caused the error.

Hello,

Please test it at Aspose.Slides for .NET 3.1.1.1