Error Mining with native build locally

#1

I am trying to run a miner in native build but without luck. All the time same error:
Ubuntu 16.04 LTS
[ 83%] Building CXX object src/libLookup/CMakeFiles/Lookup.dir/Synchronizer.cpp.o
/home/paco/Escritorio/Zilliqa/src/libLookup/Lookup.cpp: In member function ‘void Lookup::SendTxnPacketToNodes(uint32_t, uint32_t)’:
/home/paco/Escritorio/Zilliqa/src/libLookup/Lookup.cpp:3754:69: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
if (distance(m_mediator.m_ds->m_shards.at(i).begin(), it) ==
^
cc1plus: all warnings being treated as errors
src/libLookup/CMakeFiles/Lookup.dir/build.make:62: fallo en las instrucciones para el objetivo ‘src/libLookup/CMakeFiles/Lookup.dir/Lookup.cpp.o’
make[2]: *** [src/libLookup/CMakeFiles/Lookup.dir/Lookup.cpp.o] Error 1
CMakeFiles/Makefile2:1908: fallo en las instrucciones para el objetivo ‘src/libLookup/CMakeFiles/Lookup.dir/all’
make[1]: *** [src/libLookup/CMakeFiles/Lookup.dir/all] Error 2
Makefile:160: fallo en las instrucciones para el objetivo ‘all’
make: *** [all] Error 2
paco@ubuntu:~/Escritorio/Zilliqa$

Can any one help me to correct this error?
Thx!