I'm using hardhat to write a dapp. As I'm compiling my dapp I'm getting an error:

Error HH700: Artifact for contract "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol:OwnableUpgradeable" not found.

My dapp has some dependencies to openzeppelin contracts but not to this specific one. I added the required import and then got the same error, this time with @openzeppelin/contracts/access/Ownable.sol.

Added the required import and got the same with @openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol/

After adding those 3 imports the dapp finally compiled.

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

This dapp went through some phases and had in the past dependencies to those imported contracts but now it doesn't. The problem started when I deleted the artifacts folder and tried to compile. The compiler is right - those contracts can't be found in the artifacts folder but also my dapp doesn't really use them, so what would the compiler ask for them?

I'm using solidity 0.8.6.


1 Answer 1


gm. Have you tried with npx hardhat clean before compiling? It will clear the cache and delete all artifacts.


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