I have created a new “custom build” at Galaxy from a fasta file, formatting it according to the given instructions, besides giving it a “name” and “key”. It appear in the “Current Custom Builds” window in my “Users” folder at Galaxy. I have loaded the dataset onto the "Using reference genom” tool, but when trying to reach the custom build when using the Extract Genomic DNA tool, I get the message “Unavailable” Any suggestions for what to do? -tb-