Technical Tip: Firmware upgrade fails with error 'The file is not an updated file'

Starting with v7.6.2, it is not possible to successfully upgrade the firmware if the uploaded firmware image file name contains spaces or special characters. The system enforces stricter validation on multipart form data, and such filenames will result in a REST API format error.

To fix the issue, rename the file to ensure that no spaces or special characters are included in the uploaded firmware image file.

Additional possible causes of the error:

1. Importing the wrong image file for a different model.
2. Limited disk space.
3. Attempting to upgrade directly to firmware version 7.6.3 or higher on units currently running a version below 7.6.2. It is necessary to upgrade to version 7.6.2 first before proceeding to the latest patch of v7.6.x or v8.0.x.