What does this error mean and how do I fix it?

Material doesn’t have a texture property ‘_MainTex’

I am trying to compile my project which works on standalone on iOS so I am trying to understand which parts work and which need changing.

Any advice would be appreciated.

If i do the normal double click it doesn’t take me to a line number or an anything.

You are not giving mych info - are you trying to access a material property through code somewhere? If you click on the error once, does it highlight a script or something?

Nope no highlighting a script, that is why I am confused.

The only thing/s I can think of then is that you are using the terrain, especially since you mentioned for iPhone and it is not supported. Or you have a shader for some material that does not have it’s texture property set.