I've tried to migrate contract on an older version of solidity, I have modified the config.js to be as in the following enter image description here

and the smart contract solidity code I'm trying to deploy as follows enter image description here

The problem is that whenever I try to migrate the contract it displays the following error. enter image description here

any recommendations?


Remove ^ from truffle-config.js.

You want to tell truffle which version to use. The "or higher" notion only applies to pragma in Solidity.

Hope it helps.

  • Thanks for your solution it's solved. – Amr Feb 7 '20 at 11:06

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