Compiler Error AL0665

Note

The AL diagnostics topics are in preview. If you have input for this topic, we'd love to hear from you. Use our GitHub repo to create a PR and add content to this topic by going to here. To read about contributing, see Contribute to the Help. Thanks!

'{0}' is not a valid return type in runtime version '{1}'. The supported runtime versions are: {2}.

Get Started with AL
Developing Extensions