Issue with samtools

[mmoisse]

Whe I run python scripts/extract_discordants.py -c config.hydra.txt -d Sample01

I get the following issue

[bam_sort] Use -T PREFIX / -o FILE to specify temporary and final output files
Usage: samtools sort [options...] [in.bam]
Options:
...

I belief it has to do with the syntax of the samtools sort command in extract_discordants.py

samtools --version
samtools 1.3.1
Using htslib 1.3.1
Copyright (C) 2016 Genome Research Ltd.