Stranger character in the quality scores column of sam files

[illuminaGA]

Hello everyone.

I run bisulfite sequencing mapping with BSMAP. The output file was .sam format.
But the quality scores look very strange. There were lots of unknown characters(I attached a picture)

Here is the script:

./bsmap -a B4_ATGTCA_L00${i}_R1_00${j}.fastq -b B4_ATGTCA_L00${i}_R2_00${j}.fastq -d hg19.fa -o B4_ATGTCA_L00${i}_00${j}.sam -z 64 -v 15 -x 1000

Did I do something wrong or set up wrong parameter?

Thank you so much in advance!

[dpryan]

What happens if you don't use "-z 64". The manual for bsmap is wrong here, fyi (well, it's seriously outdated would be a better description).

[illuminaGA]

What happens if you don't use "-z 64". The manual for bsmap is wrong here, fyi (well, it's seriously outdated would be a better description).

It's works. Thank you so much!