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FAQ and common troubleshooting
Louis-Mael Gueguen edited this page Sep 10, 2025
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kmindex refuses to erase previous work. It produces three folders at different steps: G, index_workdir, output_querey_unitigs. Erase those to re-run. The default behaviour of the pipeline is to not erase the folders by default if they are not empty, hence this annoying issue.
What I found works best is to start the download with aspera connect as recommended. An error showed up around step 11-12 that was solved by using option --no-aspera to complete the database download and build.
A known bug causes kmdiff to duplicate the partitions in memory, so very large datasets may be difficult to work with, you will need to play around with the parameter --nb-partitions. Write an issue for kmdiff with the log and correct information.