Inspector exceptions when built-in shader is selected in the editor (v1.7)

If you mean Shader Forge 1.17 - update to 1.19 and it should be fine, unless this is due to something else.

Yes v1.17. Cannot upgrade yet due to the other problem; can't go to Unity 5.2 for a week or two.
Think this is a different issue, because the other problem was on v1.18 not v1.17

It could possibly be that perforce is disallowing access to the file or something?

AFAICT the "E:\Wish\Perforce\X\Main\Game\Unity5-PS4\Resources\unity_builtin_extra" does not exist when in the Editor, it is only created when the project is built. I think the Unity editor secretly patches though to the master copy in $Unity/Editor/Data for it's usual operations. If I had to guess, I'd say you can't load the built-in shaders code with the same method used for normal project shaders?

Still throwing an exception on v1.19 and Unity 5.20f3

//BreakTheShaderForgeInspector
//Copyright (c) 2015, Wish Studios ltd.  All rights reserved.

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;


public class BreakTheShaderForgeInspector : EditorWindow 
{
    [MenuItem( "Window/Break the Shader Forge Inspector" )]
    static void Init()
    {
        BreakTheShaderForgeInspector window = (BreakTheShaderForgeInspector)EditorWindow.GetWindow( typeof( BreakTheShaderForgeInspector ) );
        window.minSize = new Vector2( 400, 300 );
    }


    Shader pickABuiltInShader = null;


    void ShowDialog()
    {
        GUILayout.Label( "Annoy the Shader Forge Inspector" );
        GUILayout.Label( "Pick a built-in shader (one without an icon, e.g. 'Standard')" );
        GUILayout.Label( "below using the pop-up and check the errors" );
        pickABuiltInShader = EditorGUILayout.ObjectField( "Shader", pickABuiltInShader, typeof( Shader ), true ) as Shader;
        GUILayout.Label( "" ); // Spacer
    }


    void OnGUI()
    {
        ShowDialog();
    }
}