Compiled app signing with SignTool failing

I used to be able to sign my MATLAB compiled apps with the SignTool earlier (with MATLAB 2023b and earlier). But when I used MATLAB 2024b, I get errors from SignTool with error code 0x800700C1, saying the binary "is not a valid Win32 application". What has changed with MATLAB 2024?

[Walter Roberson]

(signtool appears to be https://learn.microsoft.com/en-us/windows/win32/seccrypto/signtool )

[Vinayak Phalke]

Are you saying that the SignTool has changed and no changes were made to the compiled MATLAB applications which will trigger errors from SignTool?

[Walter Roberson]

No, I am just giving a reference for SignTool as most people are unlikely to be familiar with it.

[Dani]

Did you find a fix for this? I just hit the same problem after upgrading to 2024b.

[Vinayak Phalke]

I just got a response (yesterday) from Mathworks that the latest Update4 to the 2024b release fixes this. I am working on with our IT team to test out whether that update resolved that issue or not.

[Dani]

Thanks for the update. I just checked with Update4 on 2024b and I still get the same error. Please keep me posted.

[Vinayak Phalke]

Yes, the update4 did not fix the issue for me either.

[Benedikt]

I can confirm that as well. I just updated from R2023b to R2024b (update 4) and I cannot use signtool.

However, the error message is different. It returns error code 0x800700C1

[Aditya]

is it fixed now?

[Vinayak Phalke]

No. It is not.

[Aditya]

is it now?

[Vinayak Phalke]

Good news. I got an e-mail from Mathworks informing that the latest update to MATLAB 2024b fix this and I downloaded the update 6 and yes, signing issue has been fixed.

[Titus Edelhofer]

Yes, it's fixed with Update 6 / R2025a: https://www.mathworks.com/support/bugreports/details/3461726

Answer 1

[Dani]

Update5 still did not fix this issue.

[Vinayak Phalke]

Update 6 fixed it.

[Dani]

Yepp, confirmed.