Error: None of the sub-resolvers resolved "@openzeppelin/contracts/access/Ownable.sol" location.

[naszam]

Hi,
I'm trying to use truffle-flattener v1.4.4 to flatten my truffle project contracts, but I'm getting the following error:

Error: None of the sub-resolvers resolved "@openzeppelin/contracts/access/Ownable.sol" location.

when trying the following:

$ truffle-flattener MyContract.sol > FlattenMyContract.sol

Using the following dependences:
Ubuntu 18.04
npm v13.13.0
truffle v5.1.25
solc v0.6.7

[frangio]

Hi @naszam. I wasn't able to reproduce your issue.

Does your contract compile successfully using truffle compile? What version of @openzeppelin/contracts are you using?

[naszam]

Hi @frangio.

Yep!
OpenZeppelin v3.0.1 (latest)

[frangio]

If you want to upload your project somewhere I can take a look, otherwise I don't know what could be causing this.

[naszam]

I've fixed it!
So, the issue was that I was using truffle-flattener as global dependency and not locally.
Installing both OpenZeppelin and truffle-flattener locally, I managed to get it working.
Thanks!

[alcuadrado]

Closing to clean up the repository. If this problem persists, please open a new issue with a clear explanation.

[ryanjsfx2424]

Why in the world should this be an issue with OpenZeppelin and truffle-flattener globally installed?