I'm trying to import a contract from GitHub:

pragma solidity ^0.4.18;
pragma experimental ABIEncoderV2;
pragma experimental "v0.5.0";

import "github.com/ethereum/dapp-bin/library/stringUtils.sol";

However, it says, Error: Could not find github.com/ethereum/dapp-bin/library/stringUtils.sol from any sources;. What am I doing wrong?

  • Where you doing it from(Truffle,remix,mist,parity etc..) ? I tried your code in remix , it does work for me ?
    – Rangesh
    Nov 13, 2017 at 11:48
  • I tried to compile it with Truffle 4.0.1. Do you believe it's a bug?
    – ulu
    Nov 13, 2017 at 19:28

1 Answer 1


The error is that solidity does not know the location of your import file(s).

Many solutions to this. Simple one, git clone the dapp_bin and copy it to /usr/local

Now, invoke the compilation with

solc --optimize --combined-json abi,bin,interface github.com/ethereum/dapp_bin=/usr/local/dapp_bin <solidity file>

It includes a section to map the library to the section in your machine.

  • Well, of course, I can download it and use as a local file, that's not a problem. I thought maybe there was a way to skip this part. Looks like there isn't.
    – ulu
    Nov 23, 2017 at 15:33

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