Indeed, IO540! I see the Nicosia/Athenai/Ankara/'Ercan' problem still hasn't been sorted out equably......
I've had many an entertaining time ignoring the attempts of 'Ercan' to get us to call them; leaving Ankara FIR we'd already have pre-briefed Nicosia of our intentions and requested a direct to the Nicosia/Athenai boundary, which they always gave us, together with a squawk. Then, exactly at the Ankara/Nicosia boundary we'd advise Ankara that we were changing to Nicosia; this was always responded to with a "NEGATIVE! You call ERCAN!!", to which they'd get the reply "NEGATIVE, squawking XXXX and continuing with Nicosia. Good day!".....