dexplode_init fails if num_partitions is < 2*num_vcfs.

[benjeffery]

Line 301 in check_overlap:
TypeError '>' not supported between instances of 'NoneType' and 'int'

[jeromekelleher]

This is a dupe of #146 I think. There's a workaround queued up in #145

[jeromekelleher]

I don't see how the number of partitions would induce this though?

[benjeffery]

It seem to vary - I just did more checking and got it to fail with a # partitions higher than the VCFs too.

[jeromekelleher]

I'm going to close this as completed in #164, but do reopen if it rears its ugly head again @benjeffery