<p>It looks like you are using:</p>

<p><code>$ ./allknn -q query_dataset.csv -r reference_dataset.csv -n neighbors_out.csv -d distances_out.csv -k 1 -v</code></p>

<p>to run the allknn, try </p>

<p><code>./allknn -q query_dataset.csv -r reference_dataset.csv -n neighbors_out.csv -d distances_out.csv -k 1 -v</code></p>

<p>note that I removed <code>$</code>.</p>

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