A problem in running "How to install software"

[Polan0317]

Hi!
I have a problem in running vcf.
After I key in make vcf, it shows as below:

mkdir -p reads
fastq-dump -F -X 10000 --split-files -O reads SRR1553425
Failed to call external services.
make: *** [Makefile:110: reads/SRR1553425_1.fastq] Error 64

How do I resolve this problem?
Many thanks!

[ialbert]

I found some answers here:

ncbi/sra-tools#302

it seems that it happens when you don't have internet access