Long read minimap2 error

I try using MetaPhlAn by PacBio long read

But during minimap2, the error was happened

What can I do to solve this problem?

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Hi @Arkio

The warning you see appears when no species are detected, but it is not an error. Could you tell us more about depth of the sample and which environment it is coming from?
As a double check you could also try to run the analysis by splitting the reads into short reads (with –split_reads) and map with bowtie2 to see if that allows to report any bacteria.