# GATK 4.1.4.0 Mutect stats output

I have adapted my pipeline to the new filtering strategies implemented in gatk 4.1.4.0 and while looking at its output I noticed that the stat file generated by mutect2 has a negative number:

callable -1.538687311E9


I did not find the documentation about this file content but in the gatk forum it is mentioned that is should represent the number of bases above a certain coverage (10 by default). This happened for a WGS sample, while for WES I obtain a more sensible value (well, at least positive and integer, even if maybe a tad high):

callable        8.6884303E7


Has this happened to anyone else? I compared the resulting calls obtained for the WGS with a previous version of mutect2 and they are comparable-ish (98% of the new "ones" are in common with the "old" ones), but I am still worried that something fishy is happening, expecially considering that the filtering step of the pipeline uses this stats file.

• quick followup: seems to be a bug due to an integer overflow (yay Java!), GATK developers have fixed it and I'm trying it out. Dec 6 '19 at 9:05