Every time I try to send funds from my electrum bitcoin wallet it gives me this message

Error:
u'a9cf46cf1dda4c8c97078829b9a5740d36b4eb30f8a6a854b975a27d0c361c52:1'

What can be the problem, my funds are stucked there, the seed is ok, the password is ok and I have them in Linux, Electrum version 2.5.4
I am going to try from my laptop by restoring the seed but what could have gone wrong here ?

Edit: Tried from my laptop and transaction went smoothly directly.

Strange situation ? Ubuntu 12.04 desktop, Linux Mint latest in Laptop. I restored it from seed in the lap just now.