I Cannot Log In With Master Merchant Active Even After 3/14 Update
 

I am on a machine with a six core processor.3.5ghz i7-3970X. on a 64 bit system...dual liquid cooled Nvidia GTX 690 Video Cards...32 gigs of RAM, and Master Merchant simply crashes every time I try to log in. I have to completely disable it to get into the game.

Any advice or help you folks might have to be able to use Master Merchant? Please let me know! This is so frustrating!

Try deleting all master merchant data files (MMxxData.lua) while the game is not running and let them regenerate from history.
Configure master merchant to only keep a limited amount of data. Older data is worthless and only slows the game down. If you really want to keep older data, use Guild Sales Assistant.