Can't download class ranker files - ftp directory contains no files

[mokca]

Problem:

During installation of the Master branch, download of the weights for class ranker fails.

cmake -DPYTHON_EXE_PATH=/common/app/relion/5.0.0-d96c949/conda/bin/python -DTORCH_HOME=/common/app/relion/5.0.0-d96c949/torch -DCMAKE_INSTALL_PREFIX=/common/app/relion/5.0.0-d96c949 ..

<...>
-- Will try to find Torch home directory...
-- Using Torch home: /common/app/relion/5.0.0-d96c949/torch
-- Will attempts to download model weights for dependent packages...
NOTE: You can skip this step by setting -DFETCH_WEIGHTS=OFF
Attempting to download weights for class ranker...
Traceback (most recent call last):
  File "/common/app/relion/5.0.0-d96c949/conda/lib/python3.10/urllib/request.py", line 2448, in retrfile
    self.ftp.cwd(file)
  File "/common/app/relion/5.0.0-d96c949/conda/lib/python3.10/ftplib.py", line 625, in cwd
    return self.voidcmd(cmd)
  File "/common/app/relion/5.0.0-d96c949/conda/lib/python3.10/ftplib.py", line 286, in voidcmd
    return self.voidresp()
  File "/common/app/relion/5.0.0-d96c949/conda/lib/python3.10/ftplib.py", line 259, in voidresp
    resp = self.getresp()
  File "/common/app/relion/5.0.0-d96c949/conda/lib/python3.10/ftplib.py", line 254, in getresp
    raise error_perm(resp)
ftplib.error_perm: 550 Failed to change directory.
<...>

Looking at the python module for relion_classranker, it's trying to download a file that isn't on the FTP server:

ftp://ftp.mrc-lmb.cam.ac.uk/pub/dari/classranker_v1.0.ckpt.gz

In fact, there seems to be nothing in /pub/dari

Connected to ftpv2.mrc-lmb.cam.ac.uk.
220 Welcome to LMB Anonymous FTP service
Name (ftp.mrc-lmb.cam.ac.uk:bucket): anonymous
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls /pub/dari
229 Entering Extended Passive Mode (|||62756|)
150 Here comes the directory listing.
226 Directory send OK.
ftp> get classranker_v1.0.ckpt.gz
local: classranker_v1.0.ckpt.gz remote: classranker_v1.0.ckpt.gz
229 Entering Extended Passive Mode (|||17245|)
550 Failed to open file.
ftp>

Environment:

• OS: Ubuntu 22.04.5 LTS
• MPI runtime: OpenMPI 4.1.3
• RELION version: Master branch, commit [d96c949]

[biochem-fan]

@scheres, was @dkimanius's FTP area expired? Probably we should re-upload the model to somewhere else. In some networks, FTP is blocked anyway.

[dkimanius]

Thank you for notifying us. The FTP has been restored, and, more importantly, I’ve moved the weights to a Zenodo record (zenodo.org/records/14618982). Additionally, I’ve updated the download path in the following GitHub commit: github.com/3dem/relion-classranker/commit/8727e7. Please feel free to reach out if you encounter any issues.