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Error Loading Plugin Cleo Newopcodes.cleo (2024)

The error "Error loading plugin CLEO: newopcodes.cleo" typically occurs in the context of Grand Theft Auto (GTA) games, particularly when using CLEO (CLEO library for gta) plugins. CLEO is a popular library that allows for the creation and execution of custom scripts and mods within GTA games. The newopcodes.cleo file is a component of CLEO that adds new opcodes (operation codes) which scripts can use to interact with the game in more complex ways.

If you're encountering this error, here are some steps and pieces of advice that might help:

Preventing the Error in Future Mod Builds

Once resolved, follow these best practices: error loading plugin cleo newopcodes.cleo

  1. Use Mod Loaders: Tools like Mod Loader (by LINK/2012) allow you to enable/disable plugins without deleting them.
  2. Maintain a Clean Vanilla Backup: Always keep a fresh copy of GTA SA 1.0 US. When modding goes wrong, you can restore in 30 seconds.
  3. Read Mod Documentation: Never assume a .cs mod is standalone. Check if it requires specific plugins.
  4. Update Regularly: CLEO+ and fastman92's plugins are actively maintained. Use the latest versions.

4. Additional Logging

Enable CLEO debug logging to get more details:

  1. Open CLEO\cleo.asi in a text editor (or create cleo.ini if missing).
  2. Add or modify: 
    [Main]
Log=1
  3. Run the game, then check CLEO\CLEO.log for specific errors.

1. Summary

The error occurs when the CLEO library for Grand Theft Auto: San Andreas (or another compatible game) fails to load the plugin newopcodes.cleo. This plugin extends CLEO with additional scripting opcodes. The error "Error loading plugin CLEO: newopcodes

3. Diagnostic Steps

Before fixing, verify the problem:

  1. Locate CLEO log – Open CLEO\CLEO.log. Look for lines mentioning newopcodes.cleo and error codes.
  2. Check file presence – Ensure newopcodes.cleo exists in GTA San Andreas\CLEO\.
  3. Note game version – CLEO 4+ requires GTA SA 1.0 US (Compact/Steam downgraded). Steam/other versions often fail.

Step 5: Manual Dependency Check (DLL Walker)

For technical users: Use a tool like Dependency Walker or Process Monitor to see what newopcodes.cleo is trying to load. Use Mod Loaders: Tools like Mod Loader (by

Often, the plugin needs msvcr120.dll or vcruntime140.dll. If those are missing, the error appears. You can download missing DLLs from Microsoft’s official site only (avoid DLL download sites).