Mouse.Button1Down doesn't fire

Multiple scripts in my game stopped working, particularly the Mouse.Button1Down event stopped firing completely

Even when setting up a basic listener like so it doesn’t fire, but when I tested this exact same script on a new place, it worked somehow?


I feel like I might be missing some technical detail or maybe a feature I’ve accidentally enabled, because it’s a problem with one particular place, and it doesn’t happen in other projects.

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Did you check the output for any errors? If you didn’t, you should, it will tell you any errors from any scripts in your game.

Nope, as I said it’s not error related. I’ve tried creating an empty local script, setting up a listener in it and it wouldn’t fire. But when I would do that in a clean project I just created to test, it fires.

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  1. Basic Setup Check:

    • Ensure you are using a LocalScript.
    • Make sure the script is placed in StarterPlayerScripts.
  2. Basic Script Example:
    local player = game.Players.LocalPlayer
    local mouse = player:GetMouse()

    print(“Mouse Button1Down event fired”)

  3. Common Issues to Check:

    • GUI Elements: Ensure no GUI elements are blocking the mouse input.
    • Script Context: Verify the script is a LocalScript and in the correct place.
    • Other Scripts: Temporarily disable other scripts to see if there is a conflict.
  4. Step-by-Step Troubleshooting:

    1. Disable Other Scripts: In your problematic place, disable all other scripts and test the basic script.
    2. Check Output: Look for any errors or warnings in the output window of Roblox Studio.

By following these steps, you should be able to identify and fix the issue.

copy the directory of the script in a new place

if it works, restart studio on the place the code doesn’t work
if it doesn’t, send :v:

restart studio on the place the code doesn’t work

i’ve had this issue happen yesterday, studio for some reason thought character was nil, despite not being so, just restart studio to fix it

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Big thanks to everyone who tried helping, turns out the issue was caused by another dev not using Context Action Service correctly, which caused the Button1Down event to not fire due to how CAS works.