Using Linux Mint 18.1, Kernel 4.11.8, Nvidia 381.22. 1080TI X 2

./ethminer -U -S eth.suprnova.cc:5000 -O user.worker:password--cuda-devices 0 1

If I'm using -S I get
terminate called after throwing an instance of 'boost::exception_detail::clone_impl'
  what():  BadHexCharacter
Aborted
komer@Lumining

If I'm using -F I get
std::exception::what: Exception -32003 : Client connector error: libcurl error: 52

Using other pool (Minergate) works fine by using:
./ethminer -G -F http://eth.pool.minergate.com:55751/email

I've compiled from the latest git from with no errors.
https://github.com/Genoil/cpp-ethereum


What am I missing?