topic Re: Warning appears when launching a .pyt-based add-in in Python Questions

Warning appears when launching a .pyt-based add-in

Jun — Wed, 14 Jan 2026 05:05:43 GMT

Hi all,

I created a tool for ArcGIS Pro using a .pyt file and packaged it as an add-in.

After installing the add-in, a warning appears when it is launched in ArcGIS Pro, as shown in the attached screenshot.
Please let me know how to prevent this warning.

The Japanese text shown in the screenshot is as follows.

"When you open the Python toolbar, third-party code will be executed. Please ensure that the source is trusted before continuing."

"Do you want to allow the code in this toolbox to run?"

Re: Warning appears when launching a .pyt-based add-in

DanPatterson — Wed, 14 Jan 2026 10:59:17 GMT

it seems that this has been seen before

Add a trusted toolbox list or a don't ask again bu... - Esri Community

see the discussion within the link

Re: Warning appears when launching a .pyt-based add-in

Jun — Thu, 15 Jan 2026 00:32:01 GMT

According to the article you shared, this case appears to be treated as a bug.

Therefore, I decided to rebuild it using .py and .atbx.

Thank you for your support.

Re: Warning appears when launching a .pyt-based add-in

DanPatterson — Thu, 15 Jan 2026 01:52:19 GMT

no problem