Fatal error during initialization: ENOTEMPTY, Directory not empty

[svcITA]

Installed latest version of VSCode and installed latest version of TestMyCode. Extension fails to initialize when you click on its icon in the navigation bar.

Steps to reproduce the behavior:

1. Open 'VS Code'
2. Click on 'TMC' extension
3. See error

OS: Windows 11
VSCode Version 1.123.0
TMC Extension Version 3.5.1

TMC Extension logs:

[2026-06-06 15:09:23:426] [INFO] Starting moocfi.test-my-code in "production" mode.
[2026-06-06 15:09:23:426] [INFO] Visual Studio Code version: 1.123.0
[2026-06-06 15:09:23:426] [INFO] moocfi.test-my-code version: 3.5.1
[2026-06-06 15:09:23:426] [INFO] Currently open workspace: undefined
[2026-06-06 15:09:23:426] [INFO] Platform win32 Arch x64
[2026-06-06 15:09:23:426] [INFO] TMC-Langs version: tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe
[2026-06-06 15:09:23:429] [INFO] Downloading TMC-langs from https://download.mooc.fi/tmc-langs-rust/tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe to temporary file c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli\temp-tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe
[2026-06-06 15:09:27:678] [ERROR] Mismatch between CLI and checksum, trying redownload
[2026-06-06 15:09:27:678] [DEBUG] CLI "2a31f5758b4488b279e80e57ff8248aa2485ef80d4cf27618403fb136fc07f71", hash ""
[2026-06-06 15:09:27:681] [ERROR] Fatal error during initialization:
Error: ENOTEMPTY, Directory not empty: \?\c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli '\?\c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli'.

Error: ENOTEMPTY, Directory not empty: \?\c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli '\?\c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli'
at Object.rmSync (node:fs:1223:18)
at c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\lib.js:2:461189
at Array.map ()
at ye (c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\lib.js:2:461148)
at t.ensureLangsUpdated (c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\lib.js:2:243997)
at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
at async c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\extension.js:1:1508
at async r.activate (c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\extension.js:1:1063)
at async Mb._activate (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:16021)
at async Mb._waitForDepsThenActivate (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:15963)
at async Mb._initialize (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:15330)

Observations:

It looks like it does a hash comparison, finds no file and exits. I manually downloaded the file it was trying to look for (https://download.mooc.fi/tmc-langs-rust/tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe) and placed it in the directory it was complaining is empty (c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli).

This changed the error to this:

[2026-06-06 15:26:53:970] [INFO] Starting moocfi.test-my-code in "production" mode.
[2026-06-06 15:26:53:970] [INFO] Visual Studio Code version: 1.123.0
[2026-06-06 15:26:53:970] [INFO] moocfi.test-my-code version: 3.5.1
[2026-06-06 15:26:53:970] [INFO] Currently open workspace: undefined
[2026-06-06 15:26:53:970] [INFO] Platform win32 Arch x64
[2026-06-06 15:26:53:970] [INFO] TMC-Langs version: tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe
[2026-06-06 15:26:54:215] [ERROR] Fatal error during initialization:
Error: ENOENT: no such file or directory, open 'c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli\tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe.sha256'.

Error: ENOENT: no such file or directory, open 'c:\Users\Logan Johnson\AppData\Roaming\Code\User\globalStorage\moocfi.test-my-code\cli\tmc-langs-cli-x86_64-pc-windows-msvc-0.39.4.exe.sha256'
at Object.readFileSync (node:fs:442:20)
at t.readFileSync (node:electron/js2c/node_init:2:11049)
at t.ensureLangsUpdated (c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\lib.js:2:243813)
at c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\extension.js:1:1516
at r.activate (c:\Users\Logan Johnson.vscode\extensions\moocfi.test-my-code-3.5.1\dist\extension.js:1:5517)
at Od._callActivateOptional (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:534:18592)
at Od._callActivate (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:534:18302)
at file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:534:16276
at async Mb._activate (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:16021)
at async Mb._waitForDepsThenActivate (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:15963)
at async Mb._initialize (file:///c:/Users/Logan%20Johnson/AppData/Local/Programs/Microsoft%20VS%20Code/6a44c352bd/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:530:15330)

It looks like now it wants the file renamed to have .sha256 at the end, I renamed the file and tried enabling the extension again. The file disappears and we go back to the previous, "Error: ENOTEMPTY, Directory not empty:" error message.

I have also tried to install VSCode and the TMC extension on two other computers I own (including one that is a fresh OOBE Windows 11 install) and got the same issue, which leads me to believe the problem is not my environment, rather a coding issue with the extension.

[svcITA]

Update: Downgrading to VSCode version 1.111.0 resolves the issue. Extension initializes successfully. Extension needs to be updated to be compatible with latest version of VSCode.

[kr2709]

I have exactly the same fatal error, I use TMC for Java course. I've tried deleting the folder moocfi.test-my-code in globalStorage and deleted moocfi.test-my-code folder under vscode's extension folder, uninstalled the extension, re-installed it... Nothing works.
This happens on both Windows 10 & Windows 11 machines.
My VS Code version: 1.123.0
UPDATE: Downgraded VS Code to 1.111.0, disabled auto-update and it's working now. Thank you.

[sevenmilligram]

@svcITA Thankyou! Gave up trying to solve this on Friday afternoon. Downgrading to 1.111.0 has worked for me as well.