Server transfer failed

Server transfer failed because of an exception. I keep getting this msg whenever I try to transfer from marathon to alexandria. Lvl 40 and I already transferred from alexandria to marathon. Are you not allowed to go back and forth from two different servers?
|||Must just be me, weird.
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I've been avoiding transferring because fear of something like this.

Has anyone else transferred more than once and has anyone been able to go from one server to another and back?

|||I went between athens and marathon no problem 2 times.|||I have transferred several times back and forth with no glitches. It makes me nervous though.