Game Freezes after rescuing the Council

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I recently got the Citadel DLC for ME3.  I have completed the game series twice already and have begun a new playthrough with a new character.  Now the game crashes right after the cut scene where you rescue the Council and kill Udina.  It just fades away to black screen and remaiins unresponsive.  I have reset the system several times and reinstalled the Citadel DLC twice.  Can anyone help?