ZeroDivisionError: float division by zero

[BVG]

Hi all!

When running

summarize_taxa_through_plots.py -i OTU.biom -o summary_taxa

I get the error

Traceback (most recent call last):

  File "/usr/local/bin/summarize_taxa_through_plots.py", line 143, in <module>

    main()

  File "/usr/local/bin/summarize_taxa_through_plots.py", line 140, in main

    status_update_callback=status_update_callback)

  File "/usr/local/lib/python2.7/site-packages/qiime/workflow/downstream.py", line 709, in run_summarize_taxa_through_plots

    close_logger_on_success=close_logger_on_success)

  File "/usr/local/lib/python2.7/site-packages/qiime/workflow/util.py", line 122, in call_commands_serially

    raise WorkflowError(msg)

qiime.workflow.util.WorkflowError: 

*** ERROR RAISED DURING STEP: Plot Taxonomy Summary

Command run was:

 plot_taxa_summary.py -i summary_taxa/OTU_L2.txt,summary_taxa/OTU_L3.txt,summary_taxa/OTU_L4.txt,summary_taxa/OTU_L5.txt,summary_taxa/OTU_L6.txt -o summary_taxa/taxa_summary_plots/ 

Command returned exit status: 1

Stdout:

Stderr

Traceback (most recent call last):

  File "/usr/local/bin/plot_taxa_summary.py", line 278, in <module>

    main()

  File "/usr/local/bin/plot_taxa_summary.py", line 274, in main

    resize_nth_label, label_type, include_html_legend)

  File "/usr/local/lib/python2.7/site-packages/qiime/plot_taxa_summary.py", line 1138, in make_all_charts

    resize_nth_label, label_type, include_html_legend))

  File "/usr/local/lib/python2.7/site-packages/qiime/plot_taxa_summary.py", line 984, in get_counts

    chart_type, False)

  File "/usr/local/lib/python2.7/site-packages/qiime/plot_taxa_summary.py", line 715, in get_fracs

    frac = float(n) / total

ZeroDivisionError: float division by zero

I have read it can be something related to the format of the .biom file (CSMat vs SparseMat), but I can't find where print_biom_python_config.py script is. 

Creating a file .biom_config and putting the line python_code_sparse_backend      CSMat, as suggested in another post haven't worked.

Any clue?

Thank you in advance!

[TonyWalters]

It might be the issue described here (samples with zero sequence counts after filtering): https://groups.google.com/forum/#!searchin/qiime-forum/otu_table_mc2_w_tax_no_pynast_failures.biom$20problem$20$3F/qiime-forum/pqHSVfRwOWE/zcHTbkyVBAAJ