Script help

[ExpectedIdentifier]

Not on a pc at the moment but an easier way would be to use the property on the key in the editor that automatically creates a on interact callback. I'm assuming you're trying to make something happen when the player picks up a key. If you wana do it the way you're doing it now it's SetEntityPlayerInteractCallback("livingkey", "monsterspawn", true); Can't just be making up callbacks now :-)

Also, your monsterspawn function has no parameters, it should be void monsterspawn(string &in asEntity)