Nothing happen when I loaded the Revit 2025.3 plugin

[mamadouourybalde040]

Hi,

I am trying to display a button on Revit 2025.3. I built the program and set the manifeste file correctly but when I run Revit nothing added to Add-ins tab.

Thanks

[sragan]

Its kind of hard to help without seeing your manifest file and code.

But did Revit ask if you wanted to load the add in?

And did you restart Revit at some point?  Most add ins will load on the fly, but I believe Ribbon buttons are only created when Revit starts.

[mamadouourybalde040]

Here the screenshot of a basic code  I am trying to add on Revit.

[mamadouourybalde040]

1. Framework .NET 8

2. Visual Studion Community 2022

3. Personal Laptop Window 10

4. Class Library .NET and Standard

5. Location of the manifeste file : %ProgramData%/Autodesk/Revit/...

8 Revit 2025.3

[sragan]

First troubleshooting task is if Revit asks if you want to load the addin.  If you aren't sure if you got this, shutdown revit, move teh files out of the Revit folder, restart revit, and paste the files back in.

Does revit ask if you want to load the addin?  (It will ask for "once" or "always").

If you don't see this, check the DLL properties in windows explorer and make sure windows doesn't have it locked.

Also try a simpler path to make sure you don't have a typo.   Like C:\.  You can always move it back later.

[naveen.kumar.t]

Thank you @sragan for your suggestion.

@mamadouourybalde040 , I hope you are placing the add-in manifest file in the correct location:

C:\ProgramData\Autodesk\Revit\Addins\20xx\

I recommend creating the project from scratch once more to ensure everything is set up correctly.

Please follow the steps outlined in this link.

If you continue to encounter the issue, sharing the journal file will help us better understand the cause of the problem on your end.

Journal file: https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Location-of-journa... 

(The journal file may contain confidential information, so it would be better to send it to me via personal chat. I will review the journal file)

[mamadouourybalde040]

Hi,

I did all those recommandations you have suggested. but the problem still the same, Revit doesn't even ask me if I would like to load something. I follow every step from the link of the first Revit plugin.

I recentely loaded RevitLookup but my personnal plugin Revit doesn't ask.

thanks.

[mamadouourybalde040]

Hi @naveen.kumar.t I have a private message.

[ctm_mka]

the not asking you is a bit odd. That being said, i see nothing in your code that would actually run anything, or creating a button for you to run it from.

[mamadouourybalde040]

I don't know what do you mean ? I have tried every start guide that Autodesk provide for Revit 2022, 2023, 2024 even this one 2025, to create a button or application. Nothing showing in Revit to ask to load something. I don't if there is pre-configuration of Revit to allow me for creating add-on...

[ctm_mka]

I'm guessing you are following Autodesk's 2025 "Walkthrough: Hello World" and got to this part?

That part of the tutorial is incorrect. the next part goes through how to create the buttons. Instead, i would look at the 2024 version to finish of the Hello World section.

[naveen.kumar.t · Accepted solution]

Hi,

Please take a look at this link
https://forums.autodesk.com/t5/revit-api-forum/addin-txt-problem/td-p/8660916 

[mamadouourybalde040]

No.

I didn't try that part for now. It was about the manifeste file instead Lab1PlaceGroup.addin the mine was Lab1PlaceGroup.addin.txt.

Revit could not read the file (.txt).

Autodesk should provide more informations about that part.

Because I did some windows configuration and .txt properties manage.