I am getting "Security-Unsigned Add-In" error when opening Revit.

[oguzkomcu]

I'm creating a plugin for Revit. Even though I made a code change in the file, I keep getting this error "Security-Unsigned Add-In" while opening revit. I answer this error as "always load" but when I open it again I get the same question. How can I fix this?

[jeremy_tammik]

First of all, please search previous messages in this forum, The Building Coder blog, and the Internet in general for previous discussions and solutions on this topic. Have you already done so? Thank you!

[oguzkomcu]

Jeremy, I've done the necessary research. First I created a certificate. I applied the necessary steps from this website "https://help.autodesk.com/view/RVT/2021/ENU/?guid=Revit_API_Revit_API_Developers_Guide_Introduction_...".

First, I created a digital signature. I converted this to "pfx" format. Then I applied this code "signtool.exe sign /fd SHA256 /f <.pfx-file-name> /p <password> <file-to-sign>.dll". My actions were correct but I still keep getting the same error.

[jeremy_tammik · Accepted solution]

Oh dear,  sorry to hear that. I am not an expert on this myself, sorry to say, so I can only point to prior discussions here in the forum and on The Building Coder, e.g.:

• Trusted Signature and Revit 2017 API Resources
• Trusted Signature Motivation and Fishing
• Add-In Registration – VendorId and Signature
• Parameters, Snippets, Batch Mode and Self-Signing

I also just answered your StackOverflow question on how to make a trusted publishers certificate, pointing out the latter article containing Konrad Sobon's self-signing solution:

• https://stackoverflow.com/questions/73567933/how-can-i-make-a-trusted-publishers-certificate

I hope that will enable you to solve your task.

Afaik, in the end, everybody was able to solve this issue in the past, so I am sure you will achieve the desired result as well.