I don't think ITA existing is an issue.
can you post the last few lines of your history log before the CTD
1866-02-19 : March 20, 1866 : Prussia had Austria Has Defeated Prussia
1866-02-19 : March 20, 1866 : Austria Defeats The Prussians happened to us.
1866-02-19 : March 20, 1866 : China had The Opium Trade
1866-02-19 : March 20, 1866 : United Kingdom had The Opium Trade
1866-02-20 : March 21, 1866 : II. Guard has arrived in Genova.
1866-02-22 : March 23, 1866 : Sardinia-Piedmont accepted our generous peace offer.
1866-02-22 : March 23, 1866 : Austria entered a Military Alliance with Sardinia-Piedmont.
1866-02-22 : March 23, 1866 : France accepted our generous peace offer.
1866-02-22 : March 23, 1866 : The nation of Saxony has been liberated by Austria.
1866-02-22 : March 23, 1866 : Austria entered a Military Alliance with Saxony.
1866-02-24 : March 25, 1866 : Spain went with Send the ultimatum in The Valparaiso Question.
1866-02-24 : March 25, 1866 : Chile went with We Refuse in Admiral Méndez Nuñez' Ultimatum.
1866-02-24 : March 25, 1866 : Chile had Valparaiso Bombarded By The Spanish
1866-02-24 : March 25, 1866 : Spain had Valparaiso is Bombarded
1866-02-25 : March 26, 1866 : Bavaria concluded a diplomatic deal with Hannover.
1866-02-25 : March 26, 1866 : Chile concluded a diplomatic deal with Mecklenburg.
1866-02-25 : March 26, 1866 : We went with Excellent ! Enact the reforms in Austria Secures Hegemony Over The German Lands.
1866-02-28 : March 29, 1866 : Our relations have hardly improved towards Two Sicilies.
1866-02-28 : March 29, 1866 : Abu Dhabi concluded a diplomatic deal with Oman.
1866-03-00 : April 1, 1866 : Abu Dhabi went bankrupt!
1866-03-01 : April 2, 1866 : Parma entered a Military Alliance with Modena.
1866-03-01 : April 2, 1866 : Colombia concluded a diplomatic deal with Peru.
1866-03-01 : April 2, 1866 : Bavaria went with Accept Austrian Dominance in The Fürstentag of 1866.
1866-03-01 : April 2, 1866 : Bremen went with Accept (Game Over) in The Fürstentag of 1866.
1866-03-01 : April 2, 1866 : South German Fed annexed Bremen.
1866-03-01 : April 2, 1866 : Lippe-Detmold went with Accept (Game Over) in The Fürstentag of 1866.
1866-03-01 : April 2, 1866 : South German Fed annexed Lippe-Detmold.
1866-03-02 : April 3, 1866 : Oldenburg concluded a diplomatic deal with Saxe-Meiningen.
1866-03-05 : April 6, 1866 : V. Korps has arrived in Hradec Kralove.
1866-03-07 : April 8, 1866 : Oldenburg went with Accept (Game Over) in The Fürstentag of 1866.
In this particular game i released Saxony as a satellite as i had previously annexed it. However that doesn't seem to make a difference. Also the timescale of the CTD varies, this time it went for a while before dropping out however in previous games i only get a few days play i.e:
1866-02-24 : March 25, 1866 : China had French Missionaries In China
1866-02-24 : March 25, 1866 : Spain went with Send the ultimatum in The Valparaiso Question.
1866-02-24 : March 25, 1866 : Chile went with We Refuse in Admiral Méndez Nuñez' Ultimatum.
1866-02-24 : March 25, 1866 : Chile had Valparaiso Bombarded By The Spanish
1866-02-24 : March 25, 1866 : Spain had Valparaiso is Bombarded
1866-02-24 : March 25, 1866 : Prussia had Austria Has Defeated Prussia
1866-02-24 : March 25, 1866 : We went with Excellent ! Enact the reforms in Austria Secures Hegemony Over The German Lands.
1866-02-24 : March 25, 1866 : Bavaria went with Accept Austrian Dominance in The Fürstentag of 1866.
1866-02-24 : March 25, 1866 : Braunschweig went with Accept (Game Over) in The Fürstentag of 1866.
If i've broken it, do i have to pay for it?