Bill23

You are right about the extension being wrong for two of the files. I changed it from .png to .pdn and the files opened ok. The third file still refuses to open. I'll look at it further.

I created several Paint.net files recently and now when I try to open them I get the following error message: System.ArgumentException: Parameter is not valid. at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData) at PaintDotNet.Data.PngFileType.OnLoad(Stream input) in D:\src\pdn\paintdotnet\src\PaintDotNet\Data\PngFileType.cs:line 118 at PaintDotNet.FileType.Load(Stream input) in D:\src\pdn\paintdotnet\src\Data\FileType.cs:line 459 at PaintDotNet.Functional.Func.Eval[T1,TRet](Func`2 f, T1 arg1) in D:\src\pdn\paintdotnet\src\Base\Functional\Func.cs:line 156 How can I fis this?