"Default clip could not be found in attached animations list" even though it is in the animations list

Scene setup:

http://i.imgur.com/TE8orGy.png

http://i.imgur.com/slooqT8.png

Code attached to collider script:

     public GameObject weaponObject;
 
 void OnMouseDown(){
         Debug.Log(weaponObject);
         weaponObject.animation.Play();
 }

I honestly don't know where I am going wrong, every time I click it says "Default clip could not be found in attached animations list". If I change the code to animation.Play("swing"); it errors and says the animation could not be found. Please NOTE that the animation itself is applied to the child mesh (pCube1) inside the swordMain prefab.

Driving my crazy, I have tried everything I can think of. Another weird glitch is that the animation always plays once when I start the game, despite play automatically and loop being turned off.

Thanks in advance