Troubleshooting Mod Organizer: Fixing “Cannot Start skse64_loader.exe” Errors


Imagine you’ve spent hours meticulously curating your perfect Skyrim mod list. Your virtual world is a masterpiece of graphical enhancements, immersive gameplay additions, and bug fixes. You’re eager to dive into your adventure, but suddenly, your dreams are shattered by a cryptic error message: “Cannot start skse64_loader.exe.” Frustrating, right?

This real-life scenario is all too common for avid modders. Mod Organizer, a popular tool for managing and installing mods for games like Skyrim, can sometimes throw this error, leaving you scratching your head. But fear not! In this article, we will explore the various reasons behind this issue, decipher the error codes that may accompany it, and provide detailed solutions to get you back to slaying dragons and exploring dungeons in no time.

Understanding the Problem

Common Error Codes

Before we delve into the possible solutions, it’s crucial to understand the error codes you might encounter. These codes can provide valuable clues about what’s causing the “Cannot start skse64_loader.exe” error. Here are a couple of common error codes:

Error Code 1: This error often indicates that Mod Organizer is struggling to locate the necessary SKSE64 (Skyrim Script Extender) files. It might also imply that SKSE64 is outdated or incompatible with your current mod setup.

Error Code 740: This error can be more cryptic but is often related to permission issues. Mod Organizer might not have the necessary permissions to launch SKSE64.

Now that you’re acquainted with the error codes, let’s explore potential causes and solutions.

Possible Reasons for the Issue

  1. Missing or Outdated SKSE64 Installation

If SKSE64 isn’t correctly installed or is outdated, Mod Organizer won’t be able to launch it. Ensure you have the latest version of SKSE64 and that it’s installed in the correct directory.

  1. Incorrect Load Order

An incorrect load order can lead to conflicts and errors. Use tools like LOOT (Load Order Optimization Tool) to organize your mods correctly.

  1. Missing Dependencies

Some mods require specific dependencies or libraries to function correctly. Make sure you’ve installed all the required files.

  1. Mod Organizer Configuration

Check your Mod Organizer settings and ensure they are correctly configured to work with SKSE64.

  1. Antivirus or Firewall Interference

Security software can sometimes block or interfere with Mod Organizer’s ability to launch SKSE64. Temporarily disable or whitelist Mod Organizer in your antivirus or firewall settings.

Fixing the Issue

Now that we’ve identified possible causes, let’s explore various ways to resolve the “Cannot start skse64_loader.exe” error.

  1. Automatic Solutions
  2. Mod Organizer Troubleshooter

Some versions of Mod Organizer come with a built-in troubleshooter. Run it to automatically diagnose and fix common issues.

  1. Mod Organizer Update

Ensure you have the latest version of Mod Organizer. Developers frequently release updates to address compatibility and bug issues.

  1. Manual Solutions
  2. SKSE64 Reinstallation

If SKSE64 is the culprit, uninstall and reinstall it following the installation instructions carefully.

  1. Mod Order Adjustment

Use LOOT or similar tools to reorganize your mod load order, resolving potential conflicts.

  1. Dependency Check

Go through your mod list and ensure all required dependencies are correctly installed.

  1. Mod Organizer Configuration

Double-check Mod Organizer’s settings, especially the paths and directories, to ensure they point to the right locations.

  1. Antivirus and Firewall SettingsTemporarily disable or whitelist Mod Organizer in your security software settings to prevent interference.


The “Cannot start skse64_loader.exe” error can be frustrating, but with a bit of troubleshooting and the right solutions, you can get back to enjoying your modded Skyrim adventure. Remember to stay patient and methodical, and always back up your game and mod files before making changes. Happy modding!

Frequently Asked Questions (FAQ)

Q1: Can I use Mod Organizer with other games, or is it just for Skyrim?

A1: Mod Organizer is primarily designed for Skyrim but can also be used for other Bethesda games like Fallout 4.

Q2: What’s the difference between SKSE and SKSE64?

A2: SKSE (Skyrim Script Extender) is for the original Skyrim, while SKSE64 is designed for the 64-bit version of the game, offering better stability and modding capabilities.

Q3: Can I use Mod Organizer with Steam Workshop mods?

A3: Yes, Mod Organizer can be used alongside Steam Workshop mods, but you may need to manage them carefully to avoid conflicts.

Q4: Are there alternative mod managers to Mod Organizer?

A4: Yes, alternatives like Nexus Mod Manager (NMM) and Mod Organizer 2 are available, each with its own features and capabilities.

Q5: Should I always update my mods and SKSE64 when updates are available?

A5: It’s generally a good practice to keep your mods and SKSE64 up to date, as updates often include bug fixes and compatibility improvements. However, always check mod compatibility with your current setup before updating.

Sakshi Anant Author