script not recognize the private GameOject

Questions & Answers
1

well i get an erro that says “unexpected symbol ‘model’” why does it not recognize the game object …

the script is in C#:

using UnityEngine;
using System.Collections;

public class ChangeingRoom : MonoBehaviour {
	private int _charModelIndex =0;
	
	private CharacterAssets ca;
	private string  _charModelName = "Blue Trainer";
	private GameObject model;
	// Use this for initialization
	void Start () {
	   
		ca = GameObject.Find("CharacterAssetManager").GetComponent<CharacterAssets>();
		
		InstantiateCharacterModel();
		
	
	}
	void OnGUI(){
		ChangeCharacterMesh();
		if(GUI.Button(new Rect(Screen.width*.5f-95,Screen.height-35,30,30), "<")
		    model.transform.Rotate(Vector3.up*Time.deltaTime*100);
		
		if(GUI.Button(new Rect(Screen.width*.5f+65,Screen.height-35,30,30), ">")
			model.transform.Rotate(Vector3.down *Time.deltaTime*100);
		
		}

	private void ChangeCharacterMesh(){
    if(GUI.Button(new Rect(Screen.width / 2 - 60,Screen.height - 35, 120,30),_charModelName)){
		_charModelIndex++;
		InstantiateCharacterModel();
	}
	}		
	private void InstantiateCharacterModel() {
		switch(_charModelIndex){
			case 1:
				_charModelName = "Green Trainer";
				break;
			case 2 :
				_charModelName = "Red Trainer";
			     break;
			case 3 :
				_charModelName = "White Trainer";
			     break;
			default :
				_charModelIndex = 0;
				_charModelName = "Blue Trainer";

				break;
			}
				if(transform.childCount > 0)
					for(int cnt = 0; cnt < transform.childCount; cnt++)
				Destroy(transform.GetChild(cnt).gameObject);
				
		model = Instantiate(ca.characterMesh[_charModelIndex], transform.position, Quaternion.identity) as GameObject;
		
		model.transform.parent = transform;
		model.transform.rotation = transform.rotation;
		
		//model.animation["idle1"].wrapMode = WrapMode.Loop;
		//model.animation.Play("idle1");
	}

	
	}
2

OnGUI() could be called before the instantiate was done (and model would be null while you would be trying to access it).
So In any case you should be doing:

if(GUI.Button(new Rect(Screen.width*.5f-95,Screen.height-35,30,30), "<") 
       && model != null)
   model.transform.Rotate(Vector3.up*Time.deltaTime*100);
    
if(GUI.Button(new Rect(Screen.width*.5f+65,Screen.height-35,30,30), ">") 
       && model != null)
   model.transform.Rotate(Vector3.down *Time.deltaTime*100);