Compilation issues are wording a project may encounter when submitting an application to list a token on a crypto exchange. The platform reports that the token cannot be accepted because its code cannot be correctly compiled or verified.

Compilation in programming is the conversion of a program written in a high-level source language into an equivalent program in a low-level language close to machine code that can be directly executed. In the context of blockchain this usually refers to the code of a token's smart contract: in order for the exchange to verify the contract and make sure it is correct and secure, the source code must compile without errors and match the declared parameters.

Typical causes

• a mismatch between the compiler version used during deployment and during verification;
• the absence of the necessary dependencies or libraries;
• errors in the source code or its incomplete provision;
• a mismatch in optimization settings.

To avoid such rejections, the contract's source code should be verified in advance in a public blockchain explorer, the compiler version and build settings should be fixed precisely, and the technical requirements of the specific exchange should be carefully followed.