Start animation at specific frame not working

Hi,
I created a gameObject, added animations etc all working fine.
I actually create 6 of the same object.
All the animatins start at the same time.
I want to mix it up a little by starting each at random frames within the animation.
I have read the docs and questions/answers on the forum relating to this exact issue and tried many of them, none of them seem to work.
I have a trigger that calls a spawn manager to instanatiate the game object.
I have a script on the gameobject that should randomize the start frame.
I can see in the console random numbers being generated but the frames are the same when the animation plays.
Any help appreciated.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class RandomStartFrame : MonoBehaviour {
6.  
7.     Animator anim;
8.  
9.     // Use this for initialization
10.     void Start () {
11.  
12.         anim = GetComponent<Animator>();    
13.         {
14.             int pickAnumber = Random.Range(1, 15);
15.             anim.Play("Idle1", -1, pickAnumber);          
16.             Debug.Log(pickAnumber);
17.         }
18.     }
19. }
20.  

 

try

Code (CSharp):

1. float totalFrames = 100; //total frames of your animation
2. anim.Play("Idle1", -1, (1f/totalframes)*pickAnumber)

 

Hello. I am trying to do the same thing, and I keep getting the error

"error CS1501: No overload for method 'Play' takes 3 arguments"

 

If you want to start it at any random place in the animation:

Code (CSharp):

1.   void Start()
2.     {
3.         GetComponent<Animator>().Play("SpikeBall", -1, Random.Range(0f, 1f));
4.     }