Null ref exception in UI panel when using NGUI Texture

[CarlosMassiah]

I'm currently getting a null ref exception in UI panel when I use NGUI textures on a an item.
I'm instantiating a bunch of objects that contain a couple of labels and sprites + the ngui textures. They are being instantiated in a UIGrid.
The editor spams the below command stack a few times and then does not render my objects.
I don't know what I'm doing to kill NGUI in this circumstance as I have used the same prefabs in other UI's

1. NullReferenceException
2. UnityEngine.Material..ctor (UnityEngine.Shader shader) (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/ShaderBindings.cs:149)
3. ...
4. UIPanel.LateUpdate () (at Assets/NGUI/Scripts/UI/UIPanel.cs:1170)

[ArenMook]

UIPanel's line 1170 for me is a bracket. What version are you on? Please update to the latest.

[CarlosMassiah]

On latest now. New line no's below. I can also get this to happen when selecting shaders in the editor. I can do this in a new scene with only a texture in it and selecting shader: Particles/Blended

1. NullReferenceException
2. UnityEngine.Material..ctor (UnityEngine.Shader shader) (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/ShaderBindings.cs:149)
3. UIDrawCall.CreateMaterial () (at Assets/NGUI/Scripts/Internal/UIDrawCall.cs:329)
4. ...
5. UIPanel.LateUpdate () (at Assets/NGUI/Scripts/UI/UIPanel.cs:1181)

[ArenMook]

Are you trying to use that shader on something inside a scroll view? Because the Particles/Blended doesn't have a clipped version. It can't be used. It needs to be an NGUI shader for something to be clipped.

[CarlosMassiah]

I'm not using that shader. That was just the quickest thing I came up to repro outside of my main project.

How can I tell which shaders have a culling version and which don't?
As a work around I have switched off culling in UIPanel. Thanks for the info.

[ArenMook]

If it's an NGUI shader, it will work. If it's not, it won't.