I am using Slicer 5.10 on Windows, and wanted to add the model to model distance extension today. However, when I open the Extension Manager, I get a blank window and spinning waiting cursor for an indefinite period, apparently hanging. If I try to close the window, Windows asks if I want to close…

Turning off wifi and reconnecting did not trigger a timeout or error message, but restarting my laptop did resolve the issue today. Thanks much for the notification that this wasn’t a general issue, @lassoan .

The extension manager works the same way as before and there is no difference in how it displays extensions for various Slicer versions. Due to the extension builds for Slicer-5.12 were completed and uploaded to the extension server during the day, it is possible that the server was slower, but it s…

Extension manager hangs and crashes Slicer 5.10 today

Support

mikebind (Mike Bindschadler) June 25, 2026, 3:11am 3

Thanks for the response. I will check again tomorrow and try resetting my network connections.

Total Segmentator Extension Fails Installation on Slicer 5.12.0

Topic		Replies	Views
Problematic behavior of the extension manager Support	11	1544	July 1, 2020
Extension manager causing freeze Support extensions-manager	1	105	June 26, 2025
Problem when i execute "Install Slicer Extentions " Support extensions-manager	1	594	July 18, 2019
Problems with extension manager Support extensions-manager , vtk	5	167	May 18, 2026
Extension Manager does not launch on Win 11 (Slicer 5.12.3) Support	3	61	August 24, 2026

Extension manager hangs and crashes Slicer 5.10 today

Related topics