i did not get it how should i overcome this problem, please help
$ abyss-pe name=sp_reference-f.fa k=51 in="O_GA54_1.fq.gz P_GA54_2.fq.gz"
ABYSS -k51 -q3 --coverage-hist=coverage.hist -s Montifringilla_nivalis_reference-f.fa-bubbles.fa -o Montifringilla_nivalis_reference-f.fa-1.fa O_GA54_1.fq.gz P_GA54_2.fq.gz
ABySS 2.2.3
ABYSS -k51 -q3 --coverage-hist=coverage.hist -s Montifringilla_nivalis_reference-f.fa-bubbles.fa -o Montifringilla_nivalis_reference-f.fa-1.fa O_GA54_1.fq.gz P_GA54_2.fq.gz
Reading `O_GA54_1.fq.gz'...
`O_GA54_1.fq.gz': discarded 851807 reads shorter than 51 bases
`O_GA54_1.fq.gz': discarded 349 reads containing non-ACGT characters
Reading `P_GA54_2.fq.gz'...
/home/linuxbrew/.linuxbrew/bin/abyss-pe:554: recipe for target 'Montifringilla_nivalis_reference-f.fa-1.fa' failed
make: *** [Montifringilla_nivalis_reference-f.fa-1.fa] Killed