finding neighboring components of a pin - axlAirGap help

Hello, 
I am new to skill and I need help please.

I try to find all the neighboring components of a pin (present in a certain radius r from the pin) in order to determine those which are too close to the pin. 
For that, I would like to use the airgap to have the distance edge to edge. I have tried with the axlAirGap function but I can't manage to do so. 
Indeed, it does not work for symbols and when I try to make pin to pin (I measure the distance between my pin and all the pins of the neighboring component and I take the smallest distance)
it does not work for the pins "mirrored". 
In addition, I want to do this measurement on several layers (because my pin is through). I do not understand how to make it work. 

Can anyone help me or have a similar code to do that? 
Thank's