Error: unsupported metadata version
This error occurs when the metadata version used in your Kotlin project is not supported by the current version of Kotlin. To resolve this issue, you need to check that your Kotlin version is greater than or equal to 1.0.
Here’s a detailed explanation of the error and an example:
Metadata version is an indication of the format of the compiled Kotlin bytecode. If you are using a newer version of Kotlin (e.g., 1.2) to compile your code, the produced bytecode may have a higher metadata version. However, if you try to run the code with an older version of Kotlin (e.g., 1.0) that doesn’t support the new metadata version, you will encounter this error.
To fix this error, ensure that the version of Kotlin you are using to run your code is equal to or higher than the version used for compilation.
Example:
// Kotlin code using a higher metadata version
fun main() {
println("Hello, Kotlin!")
}
In this example, let’s assume this code is compiled with Kotlin 1.2 which produces bytecode with metadata version 1.2. If you try to run this code using Kotlin 1.0, you will encounter the “unsupported metadata version” error. To fix it, ensure that you are running the code with Kotlin 1.2 or a newer version.