VariantTrack header.INFO undefined

[nictru]

Hello again,

This time I get the following error for this line:
TypeError: Cannot convert undefined or null to object

I am using a pretty blank VCF file:

##fileformat=VCFv4.2
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO
chr6	63498622	<a href='https://www.ncbi.nlm.nih.gov/snp/rs1779765' target='_blank'>rs1779765</a>	T	A	.	.	.
chr6	63498633	<a href='https://www.ncbi.nlm.nih.gov/snp/rs1779766' target='_blank'>rs1779766</a>	G	A	.	.	.
chr6	63498639	<a href='https://www.ncbi.nlm.nih.gov/snp/rs1779767' target='_blank'>rs1779767</a>	G	A	.	.	.

I performed some tests:

1. Replaced the dots in the INFO column through dummy values, did not change anything
2. Added an additional row ##INFO=<ID=AF,Number=A,Type=Float,Description="Allele Frequency" at the beginning - this solved it. SNPs appeared grey if only a dot was present in the INFO column.

How I hope this could work:

• Additional header fields should be optional
• If no header fields are present, the SNPs should be visualized in the standard blue, so that they are more easily visible

Thank you for maintaining this great package!

[nictru]

Thank you very much!