Troubleshooting Guide: How to Fix Source Information is Missing from the Debug Information for this Module Error

When working with Visual Studio or other development environments, you might encounter the error message "Source information is missing from the debug information for this module." This error can be frustrating, especially when you need to debug your code quickly. In this troubleshooting guide, we'll go through some potential causes and solutions to help you resolve this issue.

Table of Contents

  1. Possible Causes
  2. Step-by-Step Solutions
  3. FAQ
  4. Related Links

Possible Causes

There are several possible reasons why you might see this error message. Some of the most common causes include:

  1. Mismatched symbols or missing PDB files.
  2. Incorrect debug settings in your project configuration.
  3. The source code or build output has been moved or modified after being built.
  4. Issues with the debugger or development environment.

Step-by-Step Solutions

Here are a few steps to help you resolve the "Source information is missing from the debug information for this module" error:

Step 1: Ensure that PDB Files are Generated and Match the Executable

PDB (Program Database) files store debugging information about your application. Ensure that your project is generating PDB files and that they match the executable you're trying to debug. To do this:

  1. Open your project in Visual Studio.
  2. Right-click on the project in the Solution Explorer, and select "Properties."
  3. Go to the "Build" tab, and click on "Advanced."
  4. Ensure that "Debug Info" is set to "Full" or "PDB-only."
  5. Rebuild your project and check if the error persists.

Step 2: Verify Debug Settings in Project Configuration

Incorrect debug settings in your project configuration can cause issues with debugging. Check the following settings:

  1. Go to the "Debug" tab in your project properties.
  2. Make sure the "Start Action" is set to "Start project" or "Start external program" with the correct executable specified.
  3. Check that the "Working directory" is set appropriately.
  4. Save your changes and try debugging again.

Step 3: Rebuild Your Solution and Check the Output Paths

If you've moved or modified your source code or build output, the debugger might not be able to find the necessary files. To resolve this:

  1. Clean your solution by going to "Build" > "Clean Solution" in Visual Studio.
  2. Rebuild your solution by going to "Build" > "Rebuild Solution."
  3. Check the output paths in your project properties to ensure they match the actual locations of the build outputs.

Step 4: Repair or Update Your Development Environment

If the issue persists, it might be related to the debugger or development environment itself. Try repairing or updating your development environment:

  1. Repair your Visual Studio installation by going to "Add or Remove Programs" > "Visual Studio" > "Modify" > "Repair."
  2. Update your Visual Studio installation to the latest version.
  3. Check for updates to any extensions or plugins you're using.


1. What are PDB files?

PDB (Program Database) files contain debugging information about your application. They are generated during the build process and help the debugger match the executable code to the source code.

2. Can I debug my application without PDB files?

It is possible to debug an application without PDB files, but you won't have access to important debugging information such as variable names and line numbers.

3. Why are my PDB files not being generated?

PDB files may not be generated if your project's "Debug Info" setting is set to "None." Ensure that it is set to "Full" or "PDB-only."

4. How can I check if my PDB files match my executable?

You can use tools like ChkMatch to verify that your PDB files match your executable.

5. Can third-party plugins cause this error?

Yes, third-party plugins or extensions can cause this error. Try disabling any plugins or extensions you're using and see if the error persists.

  1. Debugging in Visual Studio
  2. How to: Debug an Executable Not Part of a Visual Studio Solution

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