Hi Bryan,Sorry for delay in replying but I wanted to recheck & verify events.So,On entering the runway and going through before take-off checklist, the PNF calls 'CCAS' to which the PF responds 'oops let me set take off elevation'.Where do you set this? I have already checked the altimeter settings earlier. I am using activesky but I don't see how this would cause it. I have just tried three times at EGJJ (interesting weather at present), and this call came every time.regardsKelvin