I'm working on a map where I need to create some cocoons, among other things, but that trigger doesn't work.
Also, when I tried using the spell that creates more cocoons the game crashed and gave me some eroor about dividing by zero.
The error is in my starcraft folder, but I can't find it in the directory.
Does anyone know some possible issues that would cause this?

You can't create Cocoons. The best you can do is preplace them and Move them as needed.

Some units can't be created in-game, they have to be pre-placed in the editor then to use them with triggers, use the Move Unit/Give Unit actions. The reason for the crash is probably related to trying to create these units in-game. Unfortunately the Cocoon is one of them. Almost any unit that isn't a normal Melee unit or the Hero version of that unit can not be created in-game.

I think you can't create cocoons. Why StarCraft crashes is beyond me. You should find the error log and post it in the sticky.

Thanks, everyone.
Looks like I have a lot of re-triggering to do, I'll just replace them with shuttles.
About half of my triggers use them.

scmdraft's text trigedit and any text editor can easily find and replace the unit.

If the crash is related to your map, there may be some EUD triggers (memory condition) extended unit, invalid string usage or maybe a unit's max HP is set to 0.

But I've never had a div by 0 error, if I remember correctly.

An invalid wav is a common source of crash for triggers like these. Perhaps that's the cause?