[MagickMissingDelegateErrorException: no decode delegate for this image format `' @ error/constitute.c/ReadImage/562]
ImageMagick.NativeInstance.CheckException(IntPtr exception, IntPtr result) +109
ImageMagick.NativeMagickImage.ReadFile(MagickSettings settings) +117
ImageMagick.MagickImage.Read(String fileName, MagickReadSettings readSettings, Boolean ping) +113
ImageMagick.MagickImageInfo.Read(FileInfo file) +68
ImageMagick.ImageOptimizer.GetFormatInformation(FileInfo file) +73
ImageMagick.ImageOptimizer.GetOptimizer(FileInfo file) +34
ImageMagick.ImageOptimizer.DoLosslessCompress(FileInfo file) +24
ImageMagick.Web.Handlers.ImageOptimizerHandler.CreateOptimizedFile(String cacheFileName) in E:\code\liuwork2018doing\HKImage2019\Magick.NET.Web\Handlers\ImageOptimizerHandler.cs:66
ImageMagick.Web.Handlers.ImageOptimizerHandler.GetFileName(HttpContext context) in E:\code\liuwork2018doing\HKImage2019\Magick.NET.Web\Handlers\ImageOptimizerHandler.cs:53
ImageMagick.Web.Handlers.MagickHandler.ProcessRequest(HttpContext context) in E:\code\liuwork2018doing\HKImage2019\Magick.NET.Web\Handlers\MagickHandler.cs:98
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +542
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +93
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