Error converting Eclipse STM32CubeIDE project to VS Code - "board is unknown"

JS_ · ‎2026-04-12

Could I get some guidance on this? Presumably I can fix this by installing a package or something...

Logs below (see second line from end).

Thank you!

2026-04-12 17:30:29.505 [Info] [project-manager] STM32CubeIDE project manager activation....

2026-04-12 17:32:30.960 [Info] [ide-project-convert] Starting project conversion...

2026-04-12 17:32:31.263 [Info] [ide-project-convert] cube wrapper version: 0.10.2

2026-04-12 17:32:31.551 [Info] [ide-project-convert] Starting installation...

2026-04-12 17:32:31.689 [Info] [ide-project-convert] Do you want to install the following bundles: ["osgi-exporter@0.0.4"] (yes, no, show)?

2026-04-12 17:32:31.692 [Info] [ide-project-convert] Downloading osgi-exporter@0.0.4 to '/Users/me/Library/Application Support/stm32cube/bundles/osgi-exporter/0.0.4'...

2026-04-12 17:32:32.004 [Info] [ide-project-convert] Downloading https://developer.st.com/bundles/o/osgi-exporter-0.0.4-all.bundle

Downloading https://developer.st.com/bundles/o/osgi-exporter-0.0.4-all.bundle: 1025 KiB / 61132 KiB 1% @ 3244 KiB/s

2026-04-12 17:32:32.055 [Info] [ide-project-convert]

Downloading https://developer.st.com/bundles/o/osgi-exporter-0.0.4-all.bundle: 2049 KiB / 61132 KiB 3% @ 5583 KiB/s

2026-04-12 17:32:32.084 [Info] [ide-project-convert]

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2026-04-12 17:32:32.103 [Info] [ide-project-convert]

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2026-04-12 17:32:32.157 [Info] [ide-project-convert]

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2026-04-12 17:32:32.177 [Info] [ide-project-convert]

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2026-04-12 17:32:32.211 [Info] [ide-project-convert]

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2026-04-12 17:32:32.227 [Info] [ide-project-convert]

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2026-04-12 17:32:32.392 [Info] [ide-project-convert]

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2026-04-12 17:32:32.410 [Info] [ide-project-convert]

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2026-04-12 17:32:32.464 [Info] [ide-project-convert]

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2026-04-12 17:32:32.506 [Info] [ide-project-convert]

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2026-04-12 17:32:32.542 [Info] [ide-project-convert]

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2026-04-12 17:32:32.579 [Info] [ide-project-convert]

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2026-04-12 17:32:32.741 [Info] [ide-project-convert]

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2026-04-12 17:32:32.753 [Info] [ide-project-convert]

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2026-04-12 17:32:32.823 [Info] [ide-project-convert]

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2026-04-12 17:32:32.844 [Info] [ide-project-convert]

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2026-04-12 17:32:33.017 [Info] [ide-project-convert]

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2026-04-12 17:32:33.029 [Info] [ide-project-convert]

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2026-04-12 17:32:33.079 [Info] [ide-project-convert]

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2026-04-12 17:32:33.493 [Info] [ide-project-convert]

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2026-04-12 17:32:33.505 [Info] [ide-project-convert]

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2026-04-12 17:32:33.532 [Info] [ide-project-convert]

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2026-04-12 17:32:33.559 [Info] [ide-project-convert]

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2026-04-12 17:32:33.979 [Info] [ide-project-convert]

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2026-04-12 17:32:34.028 [Info] [ide-project-convert]

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2026-04-12 17:32:34.041 [Info] [ide-project-convert]

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2026-04-12 17:32:34.069 [Info] [ide-project-convert]

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2026-04-12 17:32:34.244 [Info] [ide-project-convert]

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2026-04-12 17:32:34.265 [Info] [ide-project-convert]

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2026-04-12 17:32:34.280 [Info] [ide-project-convert]

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2026-04-12 17:32:34.504 [Info] [ide-project-convert]

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2026-04-12 17:32:34.517 [Info] [ide-project-convert]

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2026-04-12 17:32:34.938 [Info] [ide-project-convert]

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2026-04-12 17:32:34.960 [Info] [ide-project-convert]

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2026-04-12 17:32:34.979 [Info] [ide-project-convert]

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2026-04-12 17:32:35.008 [Info] [ide-project-convert]

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2026-04-12 17:32:35.028 [Info] [ide-project-convert]

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2026-04-12 17:32:35.365 [Info] [ide-project-convert]

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2026-04-12 17:32:35.545 [Info] [ide-project-convert]

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2026-04-12 17:32:36.191 [Info] [ide-project-convert]

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2026-04-12 17:32:36.210 [Info] [ide-project-convert]

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2026-04-12 17:32:36.380 [Info] [ide-project-convert]

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2026-04-12 17:32:36.391 [Info] [ide-project-convert]

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Downloading https://developer.st.com/bundles/o/osgi-exporter-0.0.4-all.bundle: 61132 KiB / 61132 KiB 100%. Done, 62600187 bytes downloaded.

2026-04-12 17:32:36.739 [Info] [ide-project-convert] Installing osgi-exporter@0.0.4...

2026-04-12 17:32:36.884 [Info] [ide-project-convert] Installed osgi-exporter@0.0.4 successfully, 59.69 MiB used

2026-04-12 17:32:36.885 [Info] [ide-project-convert]

2026-04-12 17:32:36.885 [Info] [ide-project-convert] Installation has been completed.

2026-04-12 17:32:36.887 [Info] [ide-project-convert] 'cube bundle --yes install osgi-exporter@0.0.4' exited with signal null [0]

2026-04-12 17:32:36.887 [Info] [ide-project-convert] Stopping installation...

2026-04-12 17:32:36.905 [Info] [ide-project-convert] Invoking STM32CubeIDE Eclipse exporter...

2026-04-12 17:32:40.401 [Info] [ide-project-convert] Generating project...

2026-04-12 17:32:40.884 [Error] [ide-project-convert] The specified 'STM32L476RCTx' board is unknown

2026-04-12 17:32:40.890 [Error] [ide-project-convert]: Project conversion failed with exit code: 36.

Julien D · ‎2026-04-14

Thanks for catching this, I'll create an internal ticket as follow-up.

Waiting for a fix you can use the dedicated option shared above.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

View solution in original post

Julien D · ‎2026-04-12

Hello @JS_,

It looks like the MCU device has been set as a board in the intermediate JSON file (stm32cubeide-export.json). Could you share the JSON section that indicates the MCU/Board configuration? The JSON file should be located in the destination folder.

Could you also share the MCU and Board configuration visible in STM32CubeIDE?

In the meantime, you can opt in to the option to skip this check, and relaunch again the conversion. You will be invited later to configure your project and select the device or board:

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

JS_ · ‎2026-04-13

I don't have the "Board" section in the settings. This is on STM32CubeIDE v2.1

And here's the relevant json section:

Julien D · ‎2026-04-14

Thanks for catching this, I'll create an internal ticket as follow-up.

Waiting for a fix you can use the dedicated option shared above.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.