Harvesttools BED file error

[GenomeXB71]

Hi,
Harvesttools returns a "no filter name for a bed file" error when I run the BED file filter command below:

$>harvesttools -i parsnp.ggr -b parsnp.bed -S out.snps -o parsnp.filt.ggr

I am importing a standard bed file with no header (just chr1 and the start and end locations). Any suggestions? Thank you.