Dart_LoadScriptFromKernel: The binary program does not contain 'main'

Question

I just run this code in VsCode and show this problem

Dart_LoadScriptFromKernel: The binary program does not contain 'main'.

Dart version:2.3.2

void main() {
  print("hello");
}

is there any wrong with configuration?

Upload a screenshot. It's working fine from my end dart version: 2.3.2 in VSCode — Himel Rana, Jun 20 '19 at 10:46
Does it run properly if you run `dart main.dart` (being in the file directory)? — Mattia, Jun 20 '19 at 18:14
I'm getting this error ```Error: Error when reading 'main.dart': No such file or directory``` @Mattia — Ronak Patel, Jan 08 '20 at 05:48
For future readers, note the file in the screenshot is marked with a dot next to its name. This means the file contains unsaved changes. By default, VS Code does not automatically save changes. — Boaz, Sep 30 '21 at 08:48
Does this answer your question? [Why don't other programs see the changes I made to a file in VS Code until I save those changes?](https://stackoverflow.com/questions/76984829/why-dont-other-programs-see-the-changes-i-made-to-a-file-in-vs-code-until-i-sav) — starball, Aug 27 '23 at 06:06

score 4 · Accepted Answer · answered Jul 11 '19 at 05:32

4

try saving it in your folder it works 100% and name it main

answered Jul 11 '19 at 05:32

jaffardebsawi

56
1

score 2 · Answer 2 · answered Apr 27 '20 at 12:25

2

In Visual Studio Code, this error happens when you are trying to run your main.dart file, but you have another window (or tab) open with a class file for example. Make sure when you run your code you have the main (main.dart) tab open with your main function in it.

answered Apr 27 '20 at 12:25

live-love

48,840
22
240
204

I had two vscode instances opened. Worked when closed the other one. Thanks! – mike123 Oct 06 '20 at 22:30

score 1 · Answer 3 · answered Nov 03 '19 at 11:19

1

Disable the extension. 2.Then, click on Reload Required. https://i.stack.imgur.com/XTHc6.png
Enable extension.

answered Nov 03 '19 at 11:19

Deepak kumar

21
2

Mohit Kumar · Answer 4 · 2020-03-13T11:40:40.540

On Visual Studio Click on "View"
Then click on Run
Then on the left top corner see run drop-down menu
select add configuration.
Then a JSON file appears.
Now delete everything and paste the below:

 {    
     "version": "0.2.0",
     "configurations": [
        {
            "name": "Dart: Attach to Process",
            "type": "dart",
            "request": "attach"
        },
        {
            "name": "Dart",
            "type": "dart",
            "request": "launch",
            "program": "bin/main.dart"
        },
        {
            "name": "Dart: Run all Tests",
            "type": "dart",
            "request": "launch",
            "program": "./test/"
        },
        {
            "name": "Dart: Attach to Process",
            "type": "dart",
            "request": "attach"
        },

        {
            "name": "Dart",
            "program": "bin/main.dart",
            "request": "launch",
            "type": "dart"
        }
    ] }

Now again go to let hand side top and see beside run there is a play type button.
Just press it and allow permission
Now run the code in the terminal. It will work.

score 1 · Answer 5 · answered Jul 14 '21 at 05:25

1

I also faced the same problem. Then I found that I did not save the file (code). Then I save it (ctrl+s or File > Save). Finally I run the command

dart hello.dart

and get the expected output.

answered Jul 14 '21 at 05:25

Taufiq Ahommed Neloy

199
1
7

score 0 · Answer 6 · answered Nov 02 '21 at 11:16

VScode always requires a main.dart file in the project directory with at least the minimum contents:

void main() {}

With that file present, you can then name any other file you're working on, and execute it directly from the VScode console using eg. dart hello_world.dart (with example contents):

void main() {
  print("Hello World");
}

and the main.dart file does not need to be open when this is done.

score -1 · Answer 7 · answered Feb 01 '22 at 14:21

-1

you have to do is just save the file ctrl+s

answered Feb 01 '22 at 14:21

Spoiler Hunter

1

1

https://stackoverflow.com/a/56982182/2227743 – Eric Aya Feb 01 '22 at 16:35

score -1 · Answer 8 · answered Oct 13 '22 at 10:51

-1

ctrl + s please. you don't save this file

answered Oct 13 '22 at 10:51

SerifDogru

11
1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Oct 14 '22 at 04:35

Dart_LoadScriptFromKernel: The binary program does not contain 'main'

8 Answers8