NullReferenceException from ImageGenerate constructor

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Chris Jones User Profile View All Posts by User View Thanks		#1 Posted : Wednesday, June 14, 2017 10:29:49 PM(UTC)
Rank: Advanced Member Groups: Member Joined: 6/9/2016(UTC) Posts: 34 Thanks: 22 times		I've just got a null reference exception when creating an ImageGenerator instance. As far as i can tell i'm passing in all valid values (no nulls), screenshot below of it happening. Could you comment on why GraphicsMill would be doing this please? This seems to be an one off as well which is more worrying, i've ran my code several times and no exceptions. I'm using the Aurigma.GraphicsMill.Core.x64 nuget package version 9.1.3. Code: System.NullReferenceException occurred HResult=-2147467261 Message=Object reference not set to an instance of an object. Source=Aurigma.GraphicsMill StackTrace: at Aurigma.GraphicsMill.PipelineElement..ctor(String name, Boolean isSource, Boolean isReceiver, Boolean canStartPipeline) at Aurigma.GraphicsMill.ImageGenerator..ctor(Int32 width, Int32 height, PixelFormat pixelFormat, Color backgroundColor) at Tolarus.Platform.Rendering.GraphicsMill.Pipelines.MemoryFriendlyRenderPipeline.CreateImageGenerator(Size size, PointF dpi) in C:\Dev\TFS\Tolarus Branches\Feature-Designer\Server\Tolarus.Platform\Tolarus.Platform.Rendering.GraphicsMill\Pipelines\MemoryFriendlyRenderPipeline.cs:line 50 InnerException: It may or may not help but i render images on multiple threads (using TPL) but i keep each image to their own thread so there shouldn't be any thread safety issues? Thanks

Fedor User Profile View All Posts by User View Thanks		#2 Posted : Thursday, June 15, 2017 5:43:14 AM(UTC)
Rank: Advanced Member Groups: Member, Administration, Moderator Joined: 7/28/2003(UTC) Posts: 1,660 Thanks: 5 times Was thanked: 76 time(s) in 74 post(s)		Hi Chris, Could you reproduce the problem using a console application? What kind of application (desktop, web, windows servcice) do you have?
		Best regards, Fedor Skvortsov

Chris Jones User Profile View All Posts by User View Thanks		#3 Posted : Thursday, June 15, 2017 5:51:22 AM(UTC)
Rank: Advanced Member Groups: Member Joined: 6/9/2016(UTC) Posts: 34 Thanks: 22 times		It's a WPF desktop application where i'm currently rendering to a bitmap file using pipelines, i then load the bitmap as WPF BitmapSource for display. So graphicsmill is fairly separated from the application/UI itself. This error has only happened once so i don't think its reproducible, i'll keep an eye on it to see if it happens again though. We will probably be using it from windows services and azure/web services in the future too.

Fedor User Profile View All Posts by User View Thanks		#4 Posted : Sunday, June 18, 2017 8:12:19 PM(UTC)
Rank: Advanced Member Groups: Member, Administration, Moderator Joined: 7/28/2003(UTC) Posts: 1,660 Thanks: 5 times Was thanked: 76 time(s) in 74 post(s)		Hi Chris, Alternatively you can configure Windows to create dump files when an application crashes, so we could debug the problem. Dumps can contain confidential information, so please use our case system to submit them to us. Edited by user Monday, June 19, 2017 7:56:19 AM(UTC) \| Reason: Not specified
		Best regards, Fedor Skvortsov

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