SEVERE:
java.lang.NullPointerException
at java.io.File.<init>(File.java:251)
at org.neo4j.server.preflight.PerformUpgradeIfNecessary.run(PerformUpgradeIfNecessary.java:66)
at org.neo4j.server.preflight.PreFlightTasks.run(PreFlightTasks.java:70)
at org.neo4j.server.AbstractNeoServer.runPreflightTasks(AbstractNeoServer.java:276)
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:162)
at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:86)
at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:49)
at in.co.nmsworks.nms.web.GraphDatabaseServerInvoker$LaunchHelper.run(GraphDatabaseServerInvoker.java:213)
Jan 27, 2014 1:02:21 PM org.neo4j.server.logging.Logger log
SEVERE: Unable to upgrade database
Jan 27, 2014 1:02:21 PM org.neo4j.server.logging.Logger log
SEVERE:
org.neo4j.server.ServerStartupException: Starting Neo4j Server failed: Startup failed due to preflight task [class org.neo4j.server.preflight.PerformUpgradeIfNecessary]: Unable to upgrade database
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:211)
at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:86)
at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:49)
at in.co.nmsworks.nms.web.GraphDatabaseServerInvoker$LaunchHelper.run(GraphDatabaseServerInvoker.java:213)
Caused by: org.neo4j.server.preflight.PreflightFailedException: Startup failed due to preflight task [class org.neo4j.server.preflight.PerformUpgradeIfNecessary]: Unable to upgrade database
at org.neo4j.server.AbstractNeoServer.runPreflightTasks(AbstractNeoServer.java:278)
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:162)
... 3 more
Jan 27, 2014 1:02:21 PM org.neo4j.server.logging.Logger log
SEVERE: Failed to start Neo Server on port [7474]
Help me.
Thanks in advance