· neo4j neo4j-desktop

Neo4j Desktop: undefined: Unable to extract host from undefined

During a training session I facilitated today one of the attendees got the following error message while trying to execute a query inside the Neo4j Desktop.

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This error message happens if we try to run a query when the database hasn’t been started, and would usually be accompanied by this screen:

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On this occasion that wasn’t happening, but we can easily fix it by going back to the project screen and starting the database:

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Once we do that we’ll be able to execute queries again.

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