topic Re: "This add-on cannot be validated. Please contact the distributor." error in Archicad C++ API

"This add-on cannot be validated. Please contact the distributor." error

ReignBough — Wed, 05 Oct 2022 11:28:58 GMT

I have this error on some units (PC). I know that this maybe caused by not having a correct MDID. I have the correct dev ID and MDID since it is okay on my working unit and other units too.

What are the other possible cause (and solution) to this error.

Re: "This add-on cannot be validated. Please contact the distributor." error

dfintha — Wed, 05 Dec 2018 08:25:51 GMT

Hello,

It is caused by failing the MDID validity check.
If you are sure the MDID is correct, check for possible file corruption.

Best regards,
Dénes

Re: "This add-on cannot be validated. Please contact the distributor." error

Akos Somorjai — Wed, 05 Dec 2018 10:22:56 GMT

You can also check with Dependency Walker (assuming Windows see http://www.dependencywalker.com) to check if you have all the dependencies (DLLs) installed. The easiest way to do that is to copy the add-on beside ARCHICAD.exe, and open that copy in Dependency Walker.
On macOS the

otool -L [add-on-executable]

gives you a similar, though non-hierarchical list.

Best, Akos

Re: "This add-on cannot be validated. Please contact the distributor." error

Ralph Wessel — Wed, 05 Dec 2018 10:37:48 GMT

This message is the response to every possible error loading an add-on – it would be better worded as, "something went wrong loading the add-on".

I think Ákos is right in pointing you toward checking dependencies. If another DLL your add-on is linked against is missing or an incompatible version, the add-on won't load and you get this error.