There is a bug in the game's "Aria: Eclipse" mission where Spoiler:
if you decided to not free Sederis and convinced her second-in-command to assume leadership of the Eclipse the necessary conversation with C-Sec will not trigger
and renders this mission and Aria's mission arc glitched and incompletable.
It took me a while to find a fix for this, "SqurlGoneWild" at the BioWare Forum Link created a program that patches glitched saves, allowing you to complete Aria's mission arc without having to miss any storyline!
I tried it myself and had no problems completing the mission. Although I would suggest backing up any saves before you modify them!
Hopefully this helps anyone that has had this problem.
***If you want to fix the game manually, SubaruH figured out here Link than you can:
Spoiler:
"0. Back up your save files, and make a save in front of the Eclipse second in command. (Sayn) 1. Get a hex editor (I used XVI32) and a Mass Effect checksum calculator (www.mediafire.com/?wmkztjwjimt) 2. Open the latest save in the hex editor and search around for the hex number "00 00 00 D0 00 00 00 00" (mine was at around 0xBAFF) (if anyone knows how to calculate this better, please speak up) 3. Add 0x368 to the address of the D0 4. Around that new address there should be something like 11 89 01 00 5. Change the 89 to 09 6. Save. 7. Open the file in the Mass Effect checksum tool 8. If the checksum it generates has 8 'f's in front of it, remove them 9. Change the endianess of the bytes of your checksum(if on PC...xbox users don't need to, but have to go through the process of exporting their save from the xbox ). If your checksum is AABBCCDD it will become DDCCBBAA. 12345678 becomes 78563412. Et cetera. 10. Modify the last four bytes in the save file to match the checksum 11. Save 12. Load the modified file in ME3 13. Pray to the Goddess 14. Enjoy your fixed game. The quest should complete after talking to Sayn and going to the exit. If not, reload and try again."
However, I suggest using the program that will do the hex editing for you since it's not only easier but less likely to screw up your save.
There are certain triggers for it that I believe involve saving after you Spoiler:
talk to Sayn and convince him to take over the Eclipse
that causes the event trigger to malfunction because when you go to the elevator Spoiler:
Bailey will not call to tell you Aria pulled the request to release the prisoner
and the quest will not finish. Not only does this keep you from finishing the Aria side mission but it also prevents Aria's factions from being added to the Galactic Readiness rating.
As far as I know there's no patch for it yet.
However this program will adjust your save file, resetting the mission to the point Spoiler:
before you speak to Sayn
on the paragon path, allowing you to exit Hanger Dock 2 BEFORE you save so you can complete the mission.
Could you please add a step-by-step instruction how to use the savegame fix program? I went back to the Citadel, placed my character in front of Sayn, saved the game, applied the fix over it, loaded again, went to the elevator and nothing happened, still no conversation with Bailey.
Note that I accomplished two other missions outside the citadel before I went back t the Citadel.
Could you please add a step-by-step instruction how to use the savegame fix program? I went back to the Citadel, placed my character in front of Sayn, saved the game, applied the fix over it, loaded again, went to the elevator and nothing happened, still no conversation with Bailey.
Note that I accomplished two other missions outside the citadel before I went back t the Citadel.
Please help me! Thanks.
You have to speak to Sayn again after you patch the save.
Thanks for the hint, but I have no option to talk to Sayn after I patched the save. Look at this screenshot; I faced Sayn, saved, patched, loaded again and no dialogue option:
s1.directupload.net/images/120817/8ekmyzvl.jpg
Do I stand wrong? Is this person Sayn? If yes, do I have to face him from the front or from the side or from the back?
Edit: I did it manually by changing the line 10 89 01 00 to 10 09 01 00. It works now. Thanks.
Apologies in re-animating this thread, but i was wondering if anyone had another fix? I cannt seem to download a checksum calculator from anywhere, i have however used gibbed save editor succesfully to un-glitch the hanaar quest with a guide.
Does anyone know how to use it for this quest?
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Although I would suggest backing up any saves before you modify them! 
). If your checksum is AABBCCDD it will become DDCCBBAA. 12345678 becomes 78563412. Et cetera.
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