[UWP] Appx file format is not recognized RRS feed

  • Question

  • I've been attempting to sign my appx package and am having an issue. The package certificate was created and it seems after running the SignTool sign through /debug the package and the cert works, but when signing it throws the error "This file format cannot be signed because it is not recognized." I'm not really sure how it isn't recognized, and the appx package was ported from a game engine so im unsure if it is the port or an error on my part. Any help or advice would be greatly appreciated.
    Wednesday, November 15, 2017 3:45 PM

All replies

  • Hello,

    Could you use the same cert file and run the same command line to sign a new empty package?

    If the same error persists, you might share more detailed steps through which you sign the package. If you could make sure the issue resulting from package, you could ask them to rebuild and generate a new package file.

    For more details, please refer to Sign an app package using SignTool.

    Thank you.

    Best regards,

    Mattew Wu

    MSDN Community Support
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    Thursday, November 16, 2017 8:04 AM