Fixing Fatal Error LNK1112: Resolving x64 and x86 Module Machine Type Conflicts - Step-by-Step Guide

The Fatal Error LNK1112: module machine type 'x64' conflicts with target machine type 'x86' is a common error that occurs when building projects in Visual Studio. This error occurs when there is a mismatch between the target platform and the compiled object files. In this guide, we will walk you through the steps to resolve this issue and get your project back on track.

Table of Contents

  1. Understanding the Error
  2. Fixing the Error
  1. FAQ

Understanding the Error

The error message module machine type 'x64' conflicts with target machine type 'x86' indicates that the project being built consists of object files or libraries compiled for a different platform. For instance, if your project is targeting the x86 platform but includes x64 libraries or object files, this error will be triggered.

Fixing the Error

To fix the error, follow the steps below:

Step 1: Identify the Target Platform

First, determine the target platform for your project. This can be found in the project properties. In Visual Studio, right-click on your project in the Solution Explorer, and select "Properties."

In the "General" tab, you will find the "Platform" and "Configuration" settings. Make a note of the target platform (x86, x64, or ARM).

Project Properties

Step 2: Set the Platform and Configuration

Next, ensure that the platform and configuration settings match the target platform identified in Step 1.

In Visual Studio, go to "Build" > "Configuration Manager." Ensure that the "Active solution platform" and "Platform" for your project match the target platform noted earlier. If not, change them to the correct platform.

Configuration Manager

Step 3: Update the Library and Include Paths

Now, update the library and include paths to use the correct platform-specific versions of the libraries and header files.

In Visual Studio, right-click on your project in the Solution Explorer, and select "Properties." Navigate to "VC++ Directories" and update the "Include Directories" and "Library Directories" to point to the correct platform-specific folders.

VC++ Directories

Step 4: Rebuild the Project

Finally, rebuild your project by clicking "Build" > "Rebuild Solution" in Visual Studio. The error should now be resolved.


1. What is the difference between x86 and x64 platforms?

x86 refers to the 32-bit Intel architecture, while x64 (also known as x86-64) refers to the 64-bit extension of the x86 architecture. The main difference between the two platforms is the amount of memory that can be addressed. x86 can address up to 4 GB of memory, while x64 can address much larger amounts of memory.

2. Can I build my project for both x86 and x64 platforms?

Yes, you can build your project for both platforms by creating separate configurations for each platform in Visual Studio. In the Configuration Manager, click on the "Active solution platform" dropdown and select "<New...>". Choose the desired platform and create a new configuration for it.

3. What should I do if I still get the LNK1112 error after following these steps?

If you still encounter the LNK1112 error, ensure that all libraries and object files in your project are compiled for the correct target platform. Check the documentation for any third-party libraries you are using to ensure you have the correct platform-specific versions.

4. What is the ARM platform?

ARM is a type of processor architecture used in many mobile devices and embedded systems. If your project is targeting an ARM platform, ensure that you have the appropriate ARM-specific libraries and object files.

5. Can I change the target platform of an existing project?

Yes, you can change the target platform of an existing project by following the steps in this guide. However, note that changing the target platform may introduce compatibility issues if your code relies on platform-specific features or libraries.

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