Polca fails at samtools sort step

[vidsvur]

Hi all,

We've been trying to make polca work, but we're constantly hitting the error, despite the patch fix recommended in #272

Segmentation fault      
$SAMTOOLS sort -m $MEM -T $BASM -@ $NUM_THREADS $BASM.unSorted.sam -o $BASM.alignSorted.bam 2>> samtools.err

We would highly appreciate any guidance.