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I think it's coming from SetUseOpenCL(Boolean value) see a very inner stack trace

at ImageMagick.MagickException.Throw(Exception* exception)
at ImageMagick.MagickNET.SetUseOpenCL(Boolean value)
at ImageMagick.MagickNET..cctor()

I have tried setting the environment variable MAGICK_OCL_DEVICE to off as per below but it doesn't help.

• Environment.SetEnvironmentVariable("MAGICK_OCL_DEVICE", @"off");