Troubleshooting SEHException and AVX Support in IronOCR

Updated: April 22, 2026

Unhandled exception: System.Runtime.InteropServices.SEHException

This issue is commonly encountered on machines using older Xeon, Celeron, Pentium, or Atom processors that lack AVX support.

Support for non-AVX processors was added in IronOCR version 2022.8.7804, so please upgrade to a later release.

// Example: Checking AVX support programmatically in C#
using System;

class ProcessorFeatures
{
    // Main method to check AVX support
    static void Main()
    {
        // Check if the machine's processor supports AVX
        if (IsAvxSupported())
        {
            Console.WriteLine("AVX is supported.");
        }
        else
        {
            Console.WriteLine("AVX is not supported. Consider updating IronOcr to the latest version that supports non-AVX processors.");
        }
    }

    // Function to determine if AVX is supported
    static bool IsAvxSupported()
    {
        return System.Runtime.Intrinsics.X86.Avx.IsSupported;
    }
}

// Example: Checking AVX support programmatically in C#
using System;

class ProcessorFeatures
{
    // Main method to check AVX support
    static void Main()
    {
        // Check if the machine's processor supports AVX
        if (IsAvxSupported())
        {
            Console.WriteLine("AVX is supported.");
        }
        else
        {
            Console.WriteLine("AVX is not supported. Consider updating IronOcr to the latest version that supports non-AVX processors.");
        }
    }

    // Function to determine if AVX is supported
    static bool IsAvxSupported()
    {
        return System.Runtime.Intrinsics.X86.Avx.IsSupported;
    }
}

' Example: Checking AVX support programmatically in C#
Imports System

Friend Class ProcessorFeatures
	' Main method to check AVX support
	Shared Sub Main()
		' Check if the machine's processor supports AVX
		If IsAvxSupported() Then
			Console.WriteLine("AVX is supported.")
		Else
			Console.WriteLine("AVX is not supported. Consider updating IronOcr to the latest version that supports non-AVX processors.")
		End If
	End Sub

	' Function to determine if AVX is supported
	Private Shared Function IsAvxSupported() As Boolean
		Return System.Runtime.Intrinsics.X86.Avx.IsSupported
	End Function
End Class

' Example: Checking AVX support programmatically in C#
Imports System

Friend Class ProcessorFeatures
	' Main method to check AVX support
	Shared Sub Main()
		' Check if the machine's processor supports AVX
		If IsAvxSupported() Then
			Console.WriteLine("AVX is supported.")
		Else
			Console.WriteLine("AVX is not supported. Consider updating IronOcr to the latest version that supports non-AVX processors.")
		End If
	End Sub

	' Function to determine if AVX is supported
	Private Shared Function IsAvxSupported() As Boolean
		Return System.Runtime.Intrinsics.X86.Avx.IsSupported
	End Function
End Class

In this example code, we use the System.Runtime.Intrinsics.X86.Avx.IsSupported property to determine if the processor supports AVX instructions. If AVX is not supported, it's advisable to ensure you are using a version of IronOCR that includes support for non-AVX processors.

Curtis Chau

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Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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