I don't understand this on keil

[Yacire]

Hi,

I have this following picture on keil when i am doing the first TUTORIAL (in tutorial party), the example works but i don't understand why keil display this (red cross):

Thanks for you answer, Yacire.

[wlgrd]

awneil, why shouldn't he be allowed to ask here? He is running a Nordic example, maybe other examples doesn't show those file icons and people start to wonder if this is Nordic specific?