Calculating ERROR: ZeroDivisionError: float division by zero

[Autumn-Roy]

When I try to use treeomics by default parameters with vcf file, there was always an error occurred.
bi_sim_coeff[s1_idx][s2_idx] /= no_present_vars ZeroDivisionError: float division by zero
The input of treeomics is vcf file from GATK Mutect2. After the result generated by every single sample, I use the bcftools merge them together, and replace the dot in AD and DP value by zero.