Thanks Al. I'm puzzled by the absence of an ivap.ini file on my main (FS) PC. How has it been communicating with my laptop (successfully) for so long without one? Where is this file located? - in your IvAp v2 folder? Mike L On 15 June 2012 16:03, e-mail algy.mcintyre <algy.mcintyre@xxxxxxxxxxxx>wrote: > Hi Mike > > Here is my IVAP.ini for the 'FLYING PC' (FSX) > > >