download fails/freezes on both direct connection and VPN (with academic license activated)

Support
1

I am using the TotalSegmentator extension in 3D Slicer to extract muscle and fat compartments using the tissue_4_types subtask. I have already successfully obtained and activated my academic license key.

However, I am completely blocked by downloading errors when clicking “Apply” for the tissue_4_types task (while the default total task runs perfectly fine without any issues).

To Reproduce / Network Symptoms

1.Without VPN (Direct Connection): The download process starts but is extremely slow. It consistently freezes/hangs at around 3MB and never progresses, eventually resulting in a connection timeout.

  1. 2.With VPN Enabled: The network completely fails to handshake with the model repository. 3D Slicer instantly throws an SSL/Connection error in the Python console and aborts the task Environment:

    • OS: Windows 11;RTX 5060ti 8G

    • Software: 3D Slicer (with TotalSegmentator extension)

    • Task Mode: tissue_4_types with Academic License

    Expected behavior Since my academic license is valid and entered, I expected the plugin to successfully download the tissue_4_types model weights and complete the segmentation.

    Is there a known workaround for this network issue? Or could you please provide a direct download link (like Zenodo or Google Drive) for the tissue_4_types model weights so that I can manually place them into my local .totalsegmentator folder?

    Thank you so much for your time and this amazing tool!.

2

​Update: License verified, but network drops mid-download (IncompleteRead error)

​Hi again,

​Good news: My academic license is successfully verified now. However, I am facing a new network instability issue during the weight downloading process.

​The download starts successfully but always gets interrupted halfway. The Python console throws this error:

urllib3.exceptions.IncompleteRead: IncompleteRead(186127600 bytes read, 47091847 more expected)

followed by a ChunkedEncodingError. It seems my connection drops exactly at 186MB out of the 233MB file. Because the Slicer built-in downloader doesn’t support resuming broken downloads, I am completely stuck in a loop of failing mid-way.

​My Request:

Due to the strict network firewall/instability in my hospital, could you please kindly provide a direct download link (e.g., a .zip file on Google Drive, Dropbox, or Zenodo) for the tissue_4_types (Task 485) model weights?

​If I can download it via a browser (which supports resume), I can manually extract it into my %USERPROFILE%\.totalsegmentator\nnunet\results folder.

​Thank you so much for your understanding and support!

3

Hi @Tomy_Roster,

I saw your post about the tissue_4_types download issue. I’m experiencing exactly the same problem — the download stalls at around 86% (202MB/233MB) with IncompleteRead / ChunkedEncodingError.

I’ve also tried using a VPN but it didn’t help.

Were you able to resolve this issue? Did you find a way to get the weights or a direct download link?

Any advice would be greatly appreciated!

Thanks!