Can you check the graph.db directory if there exists a directory named 'upgrade_backup'? If yes, try upgrading after renaming/deleting it.

See also: https://github.com/neo4j/neo4j/issues/2526

Besides this issue, I would recommend NOT to upgrade to 2.1.1 as there seem to be more issues related to upgrading from a 2.0 version. Rather wait for 2.1.2.

-Axel

Am 09.06.2014 19:20, schrieb Aru Sahni:
Did you do the explicit upgrade as recommended by the changelog? http://neo4j.com/docs/2.1.1/deployment-upgrading/#deployment-upgrading-two-one


On Mon, Jun 9, 2014 at 1:00 PM, AJ NOURI <[email protected] <mailto:[email protected]>> wrote:

    Right after updating Neo4j from 2.0.1 to 2.1.1, I got this error:

        Starting Neo4j Server failed: Startup failed due to preflight
        task [class
        org.neo4j.server.preflight.PerformUpgradeIfNecessary]: Unable
        to upgrade database

    (Windows Vista x64)

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