neo4j configuration: format specifier 's'

gistfile1.txt

Caused by: java.lang.RuntimeException: Format specifier 's'
	at com.tinkerpop.blueprints.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:163)
	at com.tinkerpop.blueprints.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:127)
	at com.tinkerpop.blueprints.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:123)
	at eu.granatum.wp5.Neo4jGraphFactory.<init>(Neo4jGraphFactory.java:40)
	... 46 more
Caused by: java.util.MissingFormatArgumentException: Format specifier 's'
	at java.util.Formatter.format(Formatter.java:2448)
	at java.util.Formatter.format(Formatter.java:2383)
	at org.neo4j.graphdb.factory.GraphDatabaseSetting.illegalValue(GraphDatabaseSetting.java:808)
	at org.neo4j.graphdb.factory.GraphDatabaseSetting.illegalValue(GraphDatabaseSetting.java:801)
	at org.neo4j.graphdb.factory.GraphDatabaseSetting$NumberOfBytesSetting.validate(GraphDatabaseSetting.java:599)
	at org.neo4j.graphdb.factory.GraphDatabaseSetting.validate(GraphDatabaseSetting.java:760)
	at org.neo4j.kernel.configuration.ConfigurationValidator.validate(ConfigurationValidator.java:50)
	at org.neo4j.kernel.configuration.Config.applyChanges(Config.java:125)
	at org.neo4j.kernel.InternalAbstractGraphDatabase.create(InternalAbstractGraphDatabase.java:265)
	at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:223)
	at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:79)
	at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:70)
	at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:55)
	at com.tinkerpop.blueprints.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:153)
	... 49 more