[galaxy-dev] Odd error, solution not understood

Hi all,

I'm getting the following error when attempting to do a trackster visualization:

Error: The requested genome file (/vectorbase/web/Galaxy/galaxy/tool-data/shared/ucsc/chrom/?.len) could not be opened. Exiting! Couldn't open /vectorbase/web/Galaxy/galaxy/tool-data/shared/ucsc/chrom/?.len

I found a discussion related to this error online at https://biostar.usegalaxy.org/p/6938/, but I'm unsure what the offered solution actually means in terms of what I need to do. It says " You'll need to set your dataset's database/dbkey to your custom reference genome before you can visualize it". Can someone point me in the right direction to solve this issue?

Thanks in advance,

Scott