okay, that is the answer I was waiting for :-) . I will wait for the next update or version LOL ! Thanks for all your help !

>i don't know what is in aircraft.cfg file. all i know is what>fsuipc reports the callsign to be. use pete's trafficlook to>see what i see>>jdIs the matching of the "trafficlook callsign" with the data in the c4 File case sensitive?RegardsJakov

no, i uppercase everything internally in rcjd

Thanks for the info :)RegardsJakov