Database error: No alias or index file

BLAST does not find my Galaxy-hosted and Galaxy-created database

There have been previous reports of problems with locally hosted databases, but this is for a Galaxy-hosted database.
The error message is
LibCvmfs version 2.4, revision 25 BLAST Database error: No alias or index file found for nucleotide database [/scratch/03166/xcgalaxy/main/staging//29564501/inputs/dataset_43031652_files/blastdb] in search path [/scratch/03166/xcgalaxy/main/staging/29564

This database was created on Galaxy using the ‘make BLAST database’. I ran the make database program twice, in both cases the database appears to lack an alias/index file.
Is this a Galaxy software problem?

Advice?