//cpuminer.exe -a polytimos -o 127.0.0.1:42518 -u user -p x -t 3

when you run the bat with the address "user", it does not issue any error.




//cpuminer.exe -a polytimos -o 127.0.0.1:42518 -u PQQiZd315C3CegAAw9WhqWdLGzy7ZY9kni -p x -t 3

When you run the file with your address, it gives: [2017-11-16 03:21:24] 4 miner threads started, using 'polytimos' algorithm.
[2017-11-16 03:21:26] JSON decode failed (1): '[' or '{' expected near '<'
[2017-11-16 03:21:26] getblocktemplate failed, falling back to getwork
[2017-11-16 03:21:27] JSON decode failed (1): '[' or '{' expected near '<'
[2017-11-16 03:21:27] json_rpc_call failed, retry after 10 seconds