I have sent this error to developer of Hyperconomy as well but I'm unsure who i need to send it to so here it is.

http://paste.md-5.net/wuwoyaxoca.avrasm

I am setting up a server market and the market plugin wants to create a user in the essentials userdata " I think" the user it is trying to create is "SinisterMarket" It makes this user seance it uses a dynamic economy for item pricing and the market needs money to buy from players and gains money from selling to players.

Can you link me to the ticket you made with them?

I had sent him the Error using the Bukkit PM system.