i have an error i don't recognize it

i have an error in the project while building it

Assets/NGUI/Scripts/UI/UIInput.cs(214,48): error CS0117: `UnityEngine.RuntimePlatform' does not contain a definition for `BB10Player'

how fix it

BB10 means Blackberry, which is not supported any longer. You probably got an older script from somewhere that still has code regarding that platform. You will have to find an updated version of that script.

So you can do nothing only comment that part of code which cause error it will work for me.