I have gotten the error codes anteater, caterpillar, baboon, weasel, and marionberry since I have downloaded the Taken King DLC. I have forwarded my ports, I have 50Mgbs internet that is wired to my modem, my connection tests tell me my network is fine, my NAT type is open and the game still won't work. Bungie this has to be a problem on your end because I can't think of anything else I can do. So please let me know if I'm missing some thing or that you are working on it.
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I have had the same problem for the past 2 days and I don't usually have connection issues unless the game is under maintenance.