Unsupported file format error

[NanaKay007]

Anytime I run the extension, I get this un-informative error "Unsupported file format". This is my launch.json file:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Ocamlearlybird",
            "type": "ocamlearlybird",
            "request": "launch",
            "program": "${workspaceRoot}/_build/default/src/main/main.exe",
            "console": "integratedTerminal",
            "cwd": "${workspaceRoot}",
            "arguments": ["${workspaceRoot}/src/tests/test_code/parser.mly"],
            "dotMerlins": [
                "${workspaceRoot}/.merlin"
            ],
            "noDebug": false,
            "stopOnEntry": false
        }
    ]
}

[hackwaly]

What's the version of your ocaml compiler?

[sean78901]

There are two sections to this comment.

(1) When I run Ocamlearlybird, I get a "unsupported file format" error. This is how I get the error - I enter into VS Code a hello world program - print_string "Hello world!\n";; I click "Run without Debugging". Under "Select Environment" (pull down menu), I select Ocamlearlybird. I get the "Unsupported file format" error.

(2) When I launch a terminal and type in the following commands - $ ocamlc -o helloworld helloworld.ml # to compile 'helloworld.ml' into an executable 'helloworld' $ ./helloworld # to run the program , I successfully get a "Hello world! output.

Question - I would like to use the first method (clicking on "Run without Debugging") to get the "Hello world!" output. What must I do?

[hackwaly]

The debuggee program should be bytecode file. Native executable is not supported. And currently only ocaml.4.10 4.11 is supported

[wangnianwu]

bytecode

how to provide bytecode file in this case.

[retato-snu]

I have same problem. I followed the example [https://i.imgur.com/U3GDHXM.gif], but get "Unsupported file format".

I test with Ocaml Version 4.14.0 and 5.0.0 and get same problem. What should I do?

[hackwaly]

You need install the ext built from master branch

[retato-snu]

You need install the ext built from master branch

I clone this repo and install with "opam install .". If I command ocamlearlybird --help, I can get Ocamlearybird Manual. Anything more to do?

[sim642]

Right now you also need to build the VSCode extension yourself. The one published on VSCode marketplace isn't compatible with newer OCaml versions.

[sim642]

By the way, I'm planning to revive the effort to simply make the official VSCode OCaml Platform extension take care of that side: https://github.com/ocamllabs/vscode-ocaml-platform/issues/534 and https://github.com/ocamllabs/vscode-ocaml-platform/pull/650. This should make the process more user-friendly.

[retato-snu]

Right now you also need to build the VSCode extension yourself. The one published on VSCode marketplace isn't compatible with newer OCaml versions.

It works well. Thank you so much. I look forward to being added to the offical OCaml Platform extension.