Error encountered, bailing. Network state unknown. Review successful transactions manually. Error: The contract code couldn't be stored, please check your gas amount.

[MuhtasimTanmoy]

This command don't work.
sh truffle/Compile.sh
When i manually try to migrate by ,
cd truffle; //successful
truffle compile; // successful
truffle migrate --network development //error
I get,
Error encountered, bailing. Network state unknown. Review successful transactions manually. Error: The contract code couldn't be stored, please check your gas amount.
I set the gas: 6721975 in truffle.js

also when i set gas: 6721976 get,
Error: Exceeds block gas limit.

i got this threshold from,
truffle console;
web3.eth.getBlock('latest').gasLimit;

Environment:
Truffle v4.1.5 (core: 4.1.5)
Solidity v0.4.21 (solc-js)

Any solution to run this project?