always best to use the most up to date client…the new Segreated Witness upgrade activating today prevents amllicious transactions…so hopefully you dont have any problems sending it with the new client…fyi…you can set the fee higher and it will get confirmed faster…I once sent .01 LTC to an exchange with NO fee and it took 8 months to get there…I’m sure if I tried it with a newer client it would eventually just reject it as it did yours…