Shader error in "Standard": Too many math instructions for SM2.0

I'm trying to perform a build for windows.
I'm using Unity 5.3.6.
Whenever I build, the console complains about the Unity Standard shader:

Shader error in 'Standard': Too many math instructions for SM2.0 (65 needed, max is 64). Try #pragma target 3.0 at UnityStandardCore.cginc(427) (on d3d9)

Compiling Fragment program with DIRECTIONAL SHADOWS_SCREEN LIGHTMAP_OFF DIRLIGHTMAP_OFF DYNAMICLIGHTMAP_OFF FOG_EXP2 _NORMALMAP _DETAIL_MULX2 _ALPHATEST_ON
Platform defines: UNITY_ENABLE_REFLECTION_BUFFERS UNITY_PBS_USE_BRDF1 UNITY_SPECCUBE_BOX_PROJECTION UNITY_SPECCUBE_BLENDING

Does anyone know what this error means?
I assume Unity is complaining about it's own Standard Shader.

 

Well, because of the features of the standard shader, I would assume it requires a minimum of SM3.0. I can't think of any reason it would be forcibly compiling into shader model 2.0, however.

 

I went to the project settings and disabled support for dx9. Now the warning does not occur.
By the time I'm with this project, there aren't going to be anymore computers with dx9.

 

Makes sense. Although, from memory DX9 does have SM3.0 support. I've never compiled for it though, so I couldn't say for sure.

 

I have the same kind of error when building with 5.5.1

Code (csharp):

1. Shader error in 'Standard (Specular setup)': Too many math instructions for SM2.0 (65 needed, max is 64). Try #pragma target 3.0 at /Program Files/Unity/5.5.1f1/Editor/Data/CGIncludes/UnityStandardCore.cginc(432) (on d3d9)
2.  
3. Compiling Fragment program with DIRECTIONAL SHADOWS_SCREEN LIGHTMAP_ON FOG_EXP2 _EMISSION _NORMALMAP _SPECGLOSSMAP _DETAIL_MULX2
4. Platform defines: UNITY_ENABLE_REFLECTION_BUFFERS UNITY_PBS_USE_BRDF1 UNITY_SPECCUBE_BOX_PROJECTION UNITY_SPECCUBE_BLENDING SHADER_API_DESKTOP

Any idea on how to fix it besides removing dx9 support ?...

 

I had the same problem when I went from Unity 5.2.2 to 5.5.2.
The fix for me, without removing dx9 support, was I switched from Shader Hardware Tier 3 to Shader Hardware Tier 1
Here's how:
Edit -> Graphics Emulation-> Shader Hardware Tier 1

 

Fair enough! I don't think the game would run with tier 3 anyway

EDIT: oh, that's an editor only setting

 

thanks alot

 

You don't need to change it in the editor. Set "#pragma target 3.0" in your shader. Check to make sure you don't have some downloaded shaders in your project that are overriding the default Standard shader with a lower pragma target in it.