Please help, i just destroyed half of my map trying too erase everything possible. And i deleted all ym fx and i still get the same error, i run my  map, And it says zm_fastfile could not load or somesshit and brings me too the main menu.....

I have this as well and i have no idea how to fix it

Same, any idea anyone?

Edit: So I tried looking around on my map grid and I found that I actually had an empty fx thing. It was just a tiny "fx" text. After finally selecting it and deleting it, it got rid of the issue.

could anybody help? Im having the same error and theres no out of place fx or anything so idk what to do.

could anybody help? Im having the same error and theres no out of place fx or anything so idk what to do.

For this error to happen then there HAS to be an out of place FX. Try selecting an FX ent and going to Selection > Select by Classname and make sure all FX entities that are highlighted have an FX defined.

I had this issue multiple times, very easy fix and it usually happens when you use an FX and you remove it and the fx thing is linked to nothing (I am not a very technical person as you can see).

1. Open up your map in Radiant
2. Open up the 'Entity List' tab
3. In 'Entity List' there should be a 'fx' tab, click the little square right beside it to bring up all of your effects.
4. If this error is the name as mine, you should see a blank fx space that has no writing in the box. Simply click on that box and hit the 'Backspace' button on your keyboard.

This should get rid of the lil f**ker, try recompiling your map after trying this.

was about to say this didn't work, then i decided to go through each prefab  and found it.

in other words check all your prefabs by entering them, simply doing the method above inst always enough.

thank you all for your help,

carbonkiller9