SDK is out of date

This version of MCUHex sends the firmware to the SDK, and the SDK running here is old enough to still expect a file path instead. Nothing was written to the chip.

SDK_UPDATE_REQUIRED

Symptoms

  • Flashing fails instantly, before the chip step or any progress.
  • Reading and writing memory still work normally.

Likely causes

  • The web app updates the moment it is deployed, while the tray app updates on its own schedule — so the browser can be ahead of the SDK.
  • Automatic updates are turned off, or an update was downloaded but never restarted into.

How to fix it

  1. Update from the tray icon

    Open the MCUHex tray menu and choose to check for updates, then let it restart when the new version is installed.

  2. Install the latest release by hand

    If the in-app update does not offer anything, download the newest build from the releases page and replace the installed app.

  3. Confirm the version took effect

    The tray menu shows the running version. A restart is what puts a downloaded update into use.

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