Zubetto

Hello! I'm not very familiar with programming, so hope for understanding) How can I use the function GetDevice(ID) in LUA predicate trigger condition? When I start my mission with this LUA predicate code local dev = GetDevice(20):get_frequency() local tune = (math.abs(dev-116000000)) <= 1999 return tune the following error is occurs: ... attempt to call global 'GetDevice' (a nil value) ... How to make this function being visible in LUA predicate? Please help!