Missing uniref30_2302_db_aln when running colabfold_search with local MMseqs2

Body:

Hi ColabFold/MMseqs team,

I'm encountering an error when running colabfold_search with local MMseqs2 databases. Here's the command I'm using:

colabfold_search \
  --mmseqs /home/junyu/project/mmseqs2/mmseqs/bin/mmseqs \
  /home/junyu/project/sym/motif_sym/paper_design/c/c3/MPNN_results/seqs/C3_idx_0_len_240.fa \
  /media/junyu/WinDATA/colab_database \
  msas

However, the program crashes with the following error:

Input /media/junyu/WinDATA/colab_database/uniref30_2302_db_aln does not exist
Traceback (most recent call last):
  File ".../colabfold_search", line 8, in <module>
    sys.exit(main())
  ...
  File ".../search.py", line 94, in mmseqs_search_monomer
    run_mmseqs(mmseqs, ["expandaln", ..., dbbase.joinpath(f"{uniref_db}{dbSuffix2}"), ...])
  ...
subprocess.CalledProcessError: Command '[... 'expandaln', ..., '/uniref30_2302_db_aln', ...]' returned non-zero exit status 1.

I checked my database folder at /media/junyu/WinDATA/colab_database/ and indeed, there is no file named uniref30_2302_db_aln.

❓Questions

• Should this _aln file be generated by setup_databases.sh?
• If not, where can I obtain it or how should I generate it from uniref30_2302.tar.gz?

Start with setup_databases.sh and the mmseqs_search_monomer call in search.py around line 94. Check which database artifacts the script expects from uniref30_2302.tar.gz and compare them with the command's colab_database directory. Done means the required _aln artifact is available or the expected setup path is documented and colabfold_search proceeds past expandaln.