need more graceful error messages

Issue #106 duplicate
repo owner created an issue

sometimes when searching for something less than 4 characters, if it doesn't find the result, we get this message:

"Message details: SPARQL Error: [OpenLink][Virtuoso iODBC Driver][Virtuoso Server]FT370: Wildcard word needs at least 4 leading characters () in query: SELECT * FROM WHERE { ?resourceUri ?p ?o FILTER (bif:contains(?o, \'"fmt/12*"\')) } "

but this error is not the real case as we know 3 characters plus wildcards works.

"fmt/" gives this error

whereas "fmt" works

perhaps "/" "-" needs to be handled in config as special

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