CustomFilter C# NullReferenceException



Category : Mobile Programming
Hello,
I searched the forum for a similar post and found this: [url]http://developer.nokia.com/community/discussion/showthread.php/246004-Creating-CustomEffect-in-C-NullReferenceException?highlight=customfilter[/url] but it doesn't help in answering my question. When I call RenderAsync() when using my CustomFilter, a NullReferenceException is thrown, which I need to catch and keep calling RenderAsync() until it finally works. Any ideas why? My code is really simple:
[CODE]
using (var source = new BufferImageSource(imgToProcess.data.AsBuffer()))
using (var effect = new FilterEffect(new MyCustomFilter(source)))
using (var renderer = new JpegRenderer(

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