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ExLibris Dev

z39.50 search on title returns "An error was encountered while performing the z39.50 query"


  • Product: Voyager
  • Product Version: All
  • Relevant for Installation Type: Dedicated-Direct, Direct, Local, Total Care


Problem symptoms

When a third-party client attempts to search Voyager via z39.50 by title, the search returns the following:

An error was encountered while performing the Z39.50 query: 
UnsupportedSearch (Voyager) 


The z39.50 configuration in the client is conducting a keyword search across multiple subfields (@attr 1 = 4). Keyword indexing is based on individual field/subfield combinations; the client is searching the full title (245 subfields a and b) and should be configured to query as a left-anchored search.


  1. Review the configuration for the search in the client.
  2. Update configuration to include position and truncation attributes. For example: @attr 1=4 @attr 3=1 @attr5=1
  3. Save changes and try searching again.

Additional information

See for more information on the z39.50 search attributes above.


  • Article last edited: 15-Feb-2016
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