Hi,
I was wondering if someone could help me with an error message I'm getting after performing a sam to bam conversion in galaxy. I've used Bowtie to map sequence reads to a custom fasta file corresponding to one chromosome in my organism. The mapping seems to work fine, but when I attempt a sam to bam conversion, I receive the folowing error message: 

An error occurred running this job: Samtools Version: 0.1.12 (r862)
Error creating indexes from reference (/galaxy/main_database/files/002/977/dataset_2977193.dat), [fai_build_core] line length exceeds 65535 in sequence 'LGVII'.
Segmentation fault

Any help would be appreciated.

Thanks,

Zack